• 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:
    An injection apparatus for plastics materials containing glass reinforcing fibers includes a fixed sheath 5, a movable sheath 7 slidably disposed within the fixed sheath, a mixing screw 9 rotatable within the movable sheath, a pressurized supply hopper or funnel 8 for feeding material to the mixing and conveying screw, and a piston/cylinder unit 14-16 for advancing the movable sheath and screw to inject a charge of plastics material within a chamber 26 to a mold M. The supply funnel is coupled to the movable sheath and includes a compression plate 35 controlled by a jack 38 mounted on a sliding plate 39, whereby the compression plate may be retracted into abutment with the sliding plate and laterally withdrawn to enable the reloading of the supply funnel. The mixing screw may be slightly retracted from the movable sheath to form a passage 25 for the plastics material to minimize the shearing of the fibers therein during mixing and conveyance, and the entire apparatus may be separated from the mold by a jack V to avoid undesired thermal transfers between the mold and the injection material.
    公开号:SU1058494A3
    申请号:SU813322051
    申请日:1981-05-28
    公开日:1983-11-30
    发明作者:Моннэ Бернар
    申请人:Понт-А-Муссон С.А. (Фирма)；
    IPC主号:
    专利说明:

    2. The device according to claim 1, characterized in that the connection of the casing with the plate is made in the form of parallel plates, between which is placed the hopper.
    3. Device on PP. 1 and 2, that is, that the loading hopper is equipped with a material compression mechanism, made in the form of a pressure plate, connected to a power cylinder mounted on the loading hopper.
    4. A pop-up device, characterized in that the power cylinder is mounted on a base plate mounted on a cich that can be moved perpendicular to the circumferential axis of the loading hopper.
    5. The device according to paragraphs 3 and 4, about tl, and that the pressure plate is provided with a hermetic seal located along its perimeter.
    6. A device according to Claims 3 to 5, characterized in that the hopper is provided with a limiter for moving the pressure plate.
    7. A device according to Clause 3b, characterized in that the loading hopper is provided with a power container with a lid mounted in it that can be moved.
    8. The device according to claims 1-7, characterized in that the working body is made in the form of a plunger, forming with the movable cylinder an annular chamber and a valve for blocking the communication channel of the accumulating chamber.
    Priority points.
    02.06.80 in paragraphs 1 and 2 26.11.80 in paragraphs. 3-8
    The invention relates to a device for the injection of plastics, elastomers and other similar materials and is intended for the injection of plastics with fillers, namely thermosetting plastics with glass fiber filling, and can be used in mechanical engineering. A device for injection of plastics, comprising a casing with a nozzle for feeding material into a mold that is rigidly connected to the casing, a movable cylinder mounted in the casing with the formation of a variable volume accumulator, a valve for stopping the communication channel of the accumulating chamber with a cavity of the movable cylinder, located in the movable the cylinder, the working body, the mechanism for moving the movable cylinder and the loading hopper mounted on the slide cylinder. In the known device, the movable cylinder, serves as an injection piston in the casing and forms with it a variable volume chamber designed to receive the injected material. During the injection phase, the movable cylinder forming the valve with the end of the working element in the form of an auger prevents the material from being expelled into a movable cylinder fl. The disadvantage of the device is that since the casing is rigidly connected to the mold, the temperature of the mold that is contained in such a casing prior to injection is affected. In the case of injection of thermoplastic materials, the housing is cooled due to contact with the mold, as a result of which the material hardens and clogs the nozzle. In the case of injection of thermosetting materials, the mold is heated to ensure polymerization of the material, and the jacket is also heated at the same time, as a result of which the material begins to polymerize in the jacket before injection. The closest in technical essence and the achieved result to the proposed is a device for injection of plastics and elastomeric materials, comprising a casing with a nozzle for feeding the material into the mold, a movable cylinder mounted in the casing with the formation of a cumulative variable volume chamber chamber with a cavity of a movable cylinder, placed in a movable cylinder with the possibility of axial movement of the working organ, the mechanism for moving the movable cylinder for material hopper and hopper mounted on a movable cylinder. In this device, the case does not have a rigid connection with the shape, thanks; which eliminates the temperature effect of the mold on the injected material 2. The drawback of the device is that it does not provide high-quality processing of filled, containing, for example, glass fiber or carbon materials due to the grinding of fibers between the working body - the screw and the walls of the rolling cylinder, as a result products contain only 3 (0% fiber longer than 0.5 mm in the presence of them in the starting material with a length of 13-25 mm. In addition, in a known device, a significant deterioration of the material can occur when it is fed to variable volume chamber with the help of a mixing working body - the screw, which happens when a material enters under the action of its own weight.The material section occurs between cutting the working body - auger and the inner wall of the moving cylinder.When the fiber, such as fiberglass, serves as the core material how cracking of the fibers may result. The purpose of the invention is to improve the quality of processing of the filled materials. This goal is achieved by the fact that in a device for injection of plastics and elastomeric materials containing a casing with a nozzle for feeding material into a mold, a movable cylinder mounted in the casing with the formation of a variable volume accumulating chamber with it, a valve for closing the communication channel of the accumulating chamber with a Cylinder of the movable cylinder placed in the movable cylinder with the possibility of axial movement of the working body, the mechanism for moving the movable cylinder for the injection of material and the loading hopper mounted on the movable cylinder, the mechanism for moving the movable cylinder is mounted on a carriage mounted for movement relative to the shape, and made in the form of two plates interconnected by columns, one of which houses an injection cylinder, and the other is rigidly connected to a casing, and the movable cylinder is connected to the piston of the cylinder for injection by means of a flange with pushers fixed on the sliding cylinder and an anvil plate placed between the plates, and the working body is provided with an abutment interacting on one side Porsche therein for the injection cylinder and the other to the stop plate. In addition, the connection of the casing. With, the plate is made in the form of parallel plates located between which is placed the hopper. j The loading hopper is equipped with a material compression mechanism, made in the form of a pressure plate connected to a power cylinder mounted on the loading hopper. The power cylinder is mounted on a base plate mounted on rails with the ability to move perpendicular to the longitudinal axis of the hopper. The clamping plate is provided with a hermetic seal located along its perimeter. The hopper is provided with a limiter for moving the pressure plate. The feed hopper is provided with a food container with a roof mounted therein that can be moved. The working body is made in the form of a plunger, which forms an annular chamber with the sub-cylinder and a valve for closing the channel for communicating with the accumulating chamber. Due to this arrangement of the Junction, the casing is not connected with the mold, and for the time of material mixing the injection device can be removed from the mold and bring it into contact with it only at the moment of injection of the material into the mold. Due to the fact that the loading hopper contains a squeezing mechanism, it is possible both to directly feed the material into the accumulating chamber of variable volume without using the mixing auger, or using a mixing auger in which the material undergoes minimal cutting, as a result of which the injected material retains its properties, in particular there is no destruction of the fibers. Other features of the invention are related to the fact that the compression mechanism is formed by a pressure plate moved by a ram mounted on the hopper and that the compression mechanism is retractable, the pressure plate, driven by the ram, is connected to the base plate sliding along the guides. Thus, the compression mechanism with its pressure plate compresses the material in the loading hopper, but can be removed from the loading hopper to load it with the injected material. FIG. 1 schematically shows a device for injection in the position of the completion of the injection of material, general view, section; in fig. 2 the same, in the position of mixing the material; in fig. 3 shows an injection device at the end of injection of a material, a partial section on an enlarged scale in FIG. 4 is the same in the mixing position of the material; FIG. 5 is a loading bin, side view; FIG. in fig. 6 shows section A-A in FIG. five; in fig. 7 shows a variant of the design of the injection device, general view, sectional view of FIG. 8 is a variant of the design of the hopper, a partial section. The device for injection of plastics and elastomeric materials comprises a carriage 4. mounted on a bed 2, movable relative to form 3 by means of a cylinder 4, a casing 5 with a nozzle or an outlet 6 for feeding material into the form 3, a movable cylinder 7 and a loading hopper 8, mounted on a movable cylinder 7. Inside the movable cylinder 7., the working member is arranged with the possibility of axial movement in the form of a screw 9. The movable cylinder 7 is mounted-in the sleeve 5 with the formation of a storage chamber 10 of variable volume ma, the end of the movable cylinder 7 is made conical to form with the conical end of the screw 9 of the valve to block the communication channel of the accumulation chamber 10 with the cavity of the movable cylinder 7. On the carriage 1 there is a mechanism for moving the movable cylinder 7, made in the form of two interconnected columns 11 plates 12 and 13, with the plate 12 being rigidly connected by means of parallel plates 14 to the casing 5, and on the plate 13 a cylinder 15 is placed for injection with the piston 16. At the end of the piston 16 opposite to the screw 9, an electrode is installed a motor or a motor 17, which causes the screw 9 to rotate by means of a rod 18, freely rotating inside the piston 16, but connected for translational movement with an emphasis 19, which interacts on one side with the piston 16, and on the other - with an anvil plate 20, connected to the piston 16. The end of the movable cylinder 7 on the side of the movement mechanism is provided with a flange 21 parallel to the thrust plate 20, with which it is rigidly connected using two diametrically opposed pushers each consisting of a cylinder 22 connected to the flange 21 and a piston 23 connected to the anvil plate 20. A separator valve 24 is provided to close the outlet 6. A material feed hopper (FIG. 5 and 6) is formed by a reservoir or a hopper of elongated section with a width equal to the diameter of the movable cylinder 7, on which this hopper 8 is located and into which it enters. The hopper 8 contains a material compressing mechanism, made in the form of a horizontal pressure plate 25 with dimensions slightly smaller than the internal dimensions of the boot runner 8 for moving therein, a hermetic seal 26 mounted along the perimeter edge of the pressure plate 25 and intended to press against the inner walls of this behind-the-box O3Horo hopper 8. The pressure plate 25 is connected to the thrust 27 of the power cylinder 28, passing vertically through the support plate 29, carrying the power cylinder 28 and moving along two pairs allele horizontal guides 30 mounted on the hopper 8 and protruding from it for a length at least equal to the length of the hopper 8. The base plate 29 is located above the walls of the loading bunker 8 to a height exceeding the thickness of the pressure plate 25 and the airtight seal 26. Support plate 29 is driven by a ram 31 mounted on horizontal rails 30 ,. Two guide rails 32 and 33, connected to pressure plate 25, pass through the support plate 29. On one of these tracks, namely 32, there is a movement limiter of pressure plate 25 in the form of an emphasis 34, which cooperates with a contactor 35 mounted on lever 36 ,, rigidly connected to the hopper 8. The injection device operates as follows. When cylinder 4 is in position, in which the injection device is removed from form 3, piston 16 WE is moved to plate 13, cylinders 22 are not energized. On the other hand, the screw 9 and the movable cylinder 7 are flanged to the outlet 6 of the casing 5 by means of a flange 21. The compression mechanism is in the retracted polo. from the loading hopper 8 due to the lifting of the pressure plate 25 under the action of the pull-out 27 of the power cylinder 28 and due to the sliding in the guide 30 of the support plate. 29 under the action of the power cylinder 31 (Figs. 1 and 3). The piston 16 is retracted back to the length L to open the passageway between the conical end of the screw 9 and the end of the movable cylinder 7. The piston 23 is also retracted back to the same length L in each cylinder 22. After this, the cylinders 22 are fed. Injected thermosetting plastic filled with glass fiber placed in the hopper 8. Under the action of the power cylinder 31, the support plate 29 moves in the guides 30 to be installed above the loading hopper 8, then under the action of the power cylinder 28 the pressure plate 25 compresses the mother al concluded in boot riot
    Kere 8. Under the action of the material, the hermetic seal 26 will press down to the inner walls of the 3arpy364rfo bunker B and make a hermetic connection. The motor 17 drives the screw 9 to rotate; under the action of the pressure plate 25 and the index 9, the material will start to push out into the accumulation chamber 10 formed at the end of the moving cylinder 7, and the separating fan 24 closes the outlet b of the housing 5. As a result, the material is compressed into the accumulator the chamber 10 is moving back to the movable cylinder 7, and 1 9 and the piston 16 of the injection cylinder, the cylinders 22 preventing the channel from closing between the end of the screw 9 and the end of the rolling cylinder 7,
    When the amount of material needed for molding is accumulated in chamber 10, the rotation of the screw 9 stops and the pressure applied by the power cylinder 28 in the hopper 8 is removed at the same time (Figures 2 and 4).
    Under the action of the cylinder 4, the injection device comes in contact with the mold 3. The injection phase begins. The cylinder 15 no longer energizes the cylinders 22, the screw 9 moves to the mold 3, carrying with itself the movable cylinder 7, on which its end presses, closing the channel of the message. The screw 9 compresses the material enclosed in the accumulation chamber 10, the casing is connected to the plates 12 and 13 and the cylinder by means of parallel flat plates 14, the valve 24 is open. The material from the storage chamber 10 enters the mold 3 until the tapered end of the movable cylinder 7 comes into contact with the end of the casing 5.
    This is where the injection of the material ends, the cylinder 4 retracts the injection device from the mold 3. From this point on, a new material injection cycle can begin.
    When the hopper 8 becomes empty, the pressure plate 25 is located near the screw 9, mounted on the guide 32, the stop 34 presses the contactor 35, providing control of the lifting of the pressure plate 25 in the loading hopper 8. Thus, the pressure plate 25 under the action of the power cylinder 28 is lifted, then a retractable support plate 29 is withdrawn from the hopper 8 under the action of the ram 31 to feed a new dose of material into the hopper 8. During the operation of lifting and retracting the pressure plate 25, the rotation of the screw 9 is stopped to eliminate shearing of the enclosed material therein.
    The invention relates to a device (for injection diverted from Form 3
    In order to maximize the contact time of the mold 3 and the casing 5. As a result of the limitation of the contact time, it is possible to eliminate the transfer of heat and / or cold between the mold 3 and the injection device. Heat in the case of injection of thermosetting materials or cold in the case of thermoplastic leads to the appearance in the exit hole of the storage chamber 10 skin 0 x 5, respectively, of the material polymerizing or curing due to cooling. The movement of the injection device with respect to the form 3 is obtained by connecting the casing 5 to the power cylinder 15 for injection using parallel plates 14.
    In addition, the invention makes it possible to inject plastic materials, in particular thermosets, with fiberglass or other type of fiber, taK as a passageway of length L ensures the passage of materials without damaging the fibers. Moreover, the material enters the space between the screw 9 and the movable cylinder 7 at such a pressure that its residence time in this zone is relatively short. The deformation on the shear of the material is also limited and does not entail any breaks in the fiber contained in it. The injected parts obtained from such a material have an increased mechanical strength. The deformation on the shear of the material is reduced, because under the action of pressure in the loading hopper 8, the material moves on cutting with each turn of the screw 9.
    An advantage of the invention is that since the movable cylinder 7 moves only a small distance relative to the auger.
    5 9, the material introduced from the loading bin 8 at a constant length is mixed, regardless of the length of the collection chamber 10. As a result, the material is always treated equally.
    During injection, when the screw 9 provides with its end movement of the movable cylinder 7,
    5 cylinders 22 should not produce increased force, but only support, the force for separation of the movable cylinder 7 and the screw 9. This is possible due to the fact that the cylinders 22
    0 are rigidly connected to the movable cylinder 7 on the one hand, to the injection piston 16 on the other hand, and can ensure the exact mutual arrangement of the movable cylinder 7 and the screw 9.
    five
    The plates 14 for connecting the casing 5 with the propulsion means are located on the sides of the hopper 8. To simplify the supply of plastic materials with glass fiber fillers, you can also use a hopper 8 of large dimensions that will prevent damage to the fibers.
    The embodiment of the device (Fig. 7) is based on the fact that the screw is replaced by a plunger 37, which does not rotate. A plunger 37 is mounted in the movable cylinder 7, limiting together with the movable cylinder 7 an annular chamber 38 for passing the injected material. The plunger 37 is connected to the anvil plate 20 by means of a rod 39 with a diameter equal to the inner diameter of the movable cylinder 7. The injection cylinder 40 forms the movement mechanism of the rolling cylinder 7 and, consisting of the cylinder 41 connected to the plate 13, and the piston 42 passing through the Plate 13 and connected to the anvil-20. The hopper operates in the same way as in the described construction, but ensures the flow of material into the accumulation chamber 10 by feeding it into the annular chamber 38. Such a device significantly reduces the cutting of material during the transition into the accumulative ID chamber and makes it possible to avoid breaking the fibers during this process. transition. Since the plunger 37 is no longer rotatable,
    simplified device design.
    Presented in FIG. An embodiment of the device is based on the fact that the hopper 8 is provided with a cylindrical pipe 43 communicated with an opening 44 of a power container 45 equipped with a lid46 moving under the action of a screw.
    47 rotating in the coupling 48 mounted on the collar 49 connected to the container 45. Thus, to fill the hopper 8 with the injected material, the material enclosed in the container .45 can be pressed against the material 46 using the screw 47. The cover 46 will prevent material from returning in container 45 when pressure is applied by pressure plate 25. Container 45 may be filled separately with an additional device (not shown), for example, with a filling auger. The device according to this design variant makes it possible to eliminate manipulations with the material for its supply to the hopper 8.
    When using the injection device according to the invention, more than 80% of the fiber has a length greater than 0.5 M1L. Thus obtained products have increased by 30 | modulus of elasticity increased
     more than 10% tensile strength and double impact resistance.
    Crgy 10 „i3
    ts is i
    (pi / t.3
    权利要求:
    Claims (8)
    [1]
    1. DEVICE FOR INJECTION OF PLASTICS AND ELASTOMERIC MATERIALS containing a casing with a nozzle for feeding material into the mold, a movable cylinder mounted in the casing with the formation of a storage chamber of variable volume, a valve blocking the communication channel of the storage chamber with a cavity of the movable cylinder, placed in a movable cylinder with the possibility of axial movement of the working body, the mechanism of movement of the movable cylinder for injection of material and a loading hopper mounted on a movable cylinder, which that, in order to improve the quality of processing filled materials, the mechanism for moving the movable cylinder is mounted on a carriage mounted to move relative to the form, and is made in the form of two plates interconnected by columns, on one of which there is a cylinder for injection, and the other is rigidly connected casing, the movable cylinder being connected to the cylinder piston for injection by means of a flange with pushers fixed to the movable cylinder and a thrust plate placed between the plates, and the working body n equipped with a stop interacting on the one hand with the piston of the cylinder for injection, and on the other with a thrust plate.
    SU «„ 1058494
    [2]
    2. The device according to π.1, characterized in that the connection of the casing with the plate is made in the form of parallel plates, between which a loading hopper is placed. ;
    [3]
    3. The device according to paragraphs. 1 and 2, with the exception of the fact that the feed hopper is equipped with a material compression mechanism made in the form of a pressure plate connected to a power cylinder mounted on the feed hopper.
    [4]
    4. The device according to claim 3, wherein the power cylinder is mounted on a base plate mounted on rails with the ability to move perpendicular to the longitudinal axis of the feed hopper.
    [5]
    5. The device according to PP.3 and 4, with the fact that the pressure plate is equipped with a
    P r and r and there. 02.06.80 by
    11.26.80 hermetically sealed along its perimeter
    [6]
    6. The device according to PP.3-5; characterized in that the hopper is equipped with a limiter for the movement of the pressure plate.
    [7]
    7. The device according to claims 3-6, wherein the loading hopper is equipped with a power container with a lid mounted therein with a possibility of movement.
    [8]
    8. The device according to claims 1 to 7, characterized in that the working body is made in the form of a plunger forming an annular chamber with a movable cylinder and a valve for blocking the communication channel of the storage chamber.
    tet on point. 1 and 2 pp. 3-8
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1058494A3|1983-11-30|Device for injecting plastics and elastomeric materials
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    同族专利:
    公开号 | 公开日
    DE3121428A1|1982-02-04|
    ES8203266A1|1982-04-01|
    PT73043B|1982-05-04|
    IT8121953D0|1981-05-26|
    DE3121428C2|1984-11-29|
    BR8103431A|1982-02-24|
    ATA244381A|1983-12-15|
    GB2076730A|1981-12-09|
    ES502350A0|1982-04-01|
    IT1137486B|1986-09-10|
    AT375300B|1984-07-25|
    PT73043A|1981-06-01|
    CH643179A5|1984-05-30|
    GB2076730B|1984-06-06|
    US4422842A|1983-12-27|
    引用文献:
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    FR2589473B1|1985-10-30|1988-09-16|Saint Gobain Vetrotex|POLYMERIZABLE RESIN COMPOSITION REINFORCED BY CUT WIRES|
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    US6025073A|1997-06-04|2000-02-15|N.V. Owens-Corning S.A.|High solubility size composition for fibers|
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    DE10066145B4|2000-04-14|2009-01-29|Kraussmaffei Technologies Gmbh|Method for operating an injection molding machine with continuously operating plasticizing unit|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR8012251A|FR2483318B1|1980-06-02|1980-06-02|
    FR8025408A|FR2495051B1|1980-11-28|1980-11-28|
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