• 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 an ejection device (18) for a tool (10) for producing a formed part (12), said ejection device (18) comprising an ejection element (26) movable in translation according to an ejection direction (E) between a retracted position and an ejection position, the ejection element (26) comprising a tie rod (30), a foot (32) at a first end (36) of the tie rod ( 30) and a head (34) at a second end (38) of the tie rod (30), the ejection element (26) comprising a cooling system. The cooling system has a cooling circuit extending in the tie rod (30) and the head (34), the cooling circuit comprising at least one liquid inlet in the tie rod (30) arranged through the foot (32). and at least one liquid outlet in the tie rod (30) arranged through the foot (32).
    公开号:FR3073442A1
    申请号:FR1760754
    申请日:2017-11-15
    公开日:2019-05-17
    发明作者:Stephan Servidio
    申请人:Faurecia Interieur Industrie SAS；
    IPC主号:
    专利说明:

    Ejection device for a tool for producing a formed part with cooling system
    The present invention relates to an ejection device for a tool for producing a formed part, said ejection device comprising an ejection element and an actuator, the ejection element being movable in translation in a direction of ejection between a retracted position and an ejection position and the actuator being able to move the ejection element in the ejection direction between the retracted position and the ejection position, the ejection element comprising a tie rod, one foot and one head, the tie rod extending between a first end and a second end, the head being linked to the second end, the head being intended to be in contact with the formed part, the foot being connected to the actuator, the ejection element comprising a cooling system.
    Such an ejection device makes it possible in particular to separate the part once formed from a part of a mold which has allowed the formation of the part.
    The cooling system in particular makes it possible to cool the part after molding and before ejection, so that it takes a solid state more quickly than in the absence of a cooling system.
    Document CN 201856364 describes a cooling system in an ejection device. This cooling system includes a water distribution head connected to one end of the tie rod under the foot.
    Such a system is bulky, in particular it is necessary to provide space under the ejection plate for the dispensing head.
    An object of the invention is therefore to propose an ejection device with a cooling system by limiting the space occupied by the cooling system.
    To this end, the subject of the invention is an ejection device of the aforementioned type, in which the foot surrounds the first end of the tie rod and the cooling system has a cooling circuit extending in the tie rod and the head, the cooling circuit comprising at least one liquid inlet in the tie rod arranged through the foot and at least one liquid outlet in the tie rod arranged through the foot.
    By integrating a liquid inlet and a liquid outlet directly through the stand, it reduces the bulk due to the addition of the cooling system.
    According to particular modes of the invention, the opening assembly has one or more of the following characteristics, taken in isolation or according to any technically possible combination (s):
    - The cooling circuit includes a single liquid inlet and a single liquid outlet, the liquid inlet and outlet being in the tie rod and arranged through the foot;
    - the liquid inlet and the liquid outlet are substantially included in a first plane, the link between the foot and the actuator being outside said first plane;
    - The foot is a separate part of the tie rod mounted around the first end of the tie rod, in particular with a screw located at the first end of the tie rod in a longitudinal direction of the tie rod;
    - The head is a separate part of the tie rod mounted on the second end of the tie rod, in particular by a key;
    - the cooling circuit comprises in the tie rod an internal conduit and an external conduit, the internal and external conduits being substantially concentric, the internal conduit being connected to one of the liquid inlet and the liquid outlet and the external conduit being connected to each other among the liquid inlet and the liquid outlet;
    - the internal conduit is connected to the liquid inlet and the external conduit is connected to the liquid outlet;
    the head comprises an internal circuit, the internal circuit forming part of the cooling circuit, the internal circuit having a head inlet and a head outlet, the head inlet being connected to one of the internal duct and the duct external, the head outlet being connected to the other among the internal conduit and the external conduit;
    - the liquid outlet of the cooling circuit is offset towards the head relative to the liquid inlet.
    The invention further relates to a tool for producing a formed part comprising a first mold part, a second mold part and an ejection device as described above, the first and second mold parts each comprising a forming wall, the first and second parts being movable in translation relative to one another between an open position, in which the first and the second parts are spaced from one another, and a closed position, in which the forming walls of the first and second parts partially define between them a cavity having the shape of the part to be formed, the ejection element of the ejection device being movable relative to the first mold part of the tool between the retracted position, in which the head of the ejection element extends in contact with the first part and defines a mold wall ge, the molding wall forming a continuous surface with the forming walls to define the cavity, and the ejection position, in which at least a part of the head of the ejection element projects from the first part towards the second part and the molding wall of the head is spaced from the forming wall of the first part.
    Other characteristics and advantages of the invention will appear on reading the description which follows, given solely by way of example and made with reference to the appended drawings, in which:
    FIG. 1 is a diagrammatic view partially in section of a tool for producing a part formed with an ejection device according to an embodiment of the invention in a retracted position,
    FIG. 2 is a diagrammatic view partially in section of the tool of FIG. 1 with the ejection device in an ejection position,
    FIG. 3 is a schematic view, in the longitudinal direction of the tie rod, of the tie rod, of the foot, of the actuator and of the liquid inlet and outlet,
    FIG. 4 is a schematic sectional view of the head and of a second end of the tie rod of the ejection device of FIG. 1, and
    - Figure 5 is a schematic sectional view of the foot and of a first end of the tie rod of the ejection device of Figure 1.
    A tool 10 for producing a formed part 12 is shown in FIG. 1.
    The production tool 10 comprises a first mold part 14, a second mold part 16 and an ejection device 18.
    The first and second mold parts 14, 16 each comprise a forming wall 20, 22.
    The first and second parts 14, 16 are movable in translation with respect to one another between an open position and a closed position.
    In the open position shown in Figure 2, the first and second parts 14, 16 are spaced from each other. This makes it possible in particular to make a possible part 12 previously formed accessible.
    In the closed position shown in FIG. 1, the forming walls 20, 22 of the first part 14 and of the second part 16 partially define between them a cavity 24 having the shape of the part to be formed. In the closed position, the first and second parts 14, 16 are in contact with each other.
    The ejection device 18 comprises an ejection element 26 and an actuator 28.
    The ejection element 26 comprises a tie rod 30, a foot 32 and a head 34.
    The tie rod 30 has an elongated shape in a so-called longitudinal direction X, in particular an elongated cylindrical shape.
    The tie rod 30 extends between a first end 36 and a second end 38 and has between the two ends 36, 38 a lateral surface 37.
    As can be seen in FIG. 4, the tie rod 30 defines a hole 39 on the lateral surface 37 near the second end 38. The hole 39 is, for example, blind, and more particularly oblong.
    The head 34 is located at the second end 38 of the tie rod 30 and the foot 32 is located at the first end 36 of the tie rod 30.
    The head 34 is designed to be in contact with the formed part 12.
    The head 34 defines a molding wall 40.
    The molding wall 40 is located here opposite the head 34 with respect to the tie rod 30 in the longitudinal direction X of the tie rod 30.
    The head 34 has at least partially a shape complementary to the first part 14, so that the head 34 is able to be fitted into a recess formed in the first part 14 and the molding wall 40 then forms a continuous surface with the forming wall of the first part 14.
    The head 34 here surrounds the second end 38 of the tie rod 30 over the entire circumference of the tie rod 30.
    The head 34 is here a separate part of the tie rod 30 mounted on the second end 38 of the tie rod 30, in particular by a key 42.
    The head 34 defines a through hole 43 in alignment with the hole 39 in the tie rod 30. The through hole 43 is, for example, oblong and has a perimeter substantially identical to the hole 39 in the tie rod.
    The key 42 is located in the holes 39 and 43 of the tie rod 30 and of the head 34, so that the tie rod 30 and the head 34 are integral in rotation and in translation in the longitudinal direction X of the tie rod 30.
    The key system 42 makes it possible in particular not to put screws at the second end 38 of the tie rod 30 and thus to release said second end 38.
    The foot 32 surrounds the first end 36 of the tie rod, in particular over the entire circumference of the tie rod.
    The foot 32 is here a separate part from the tie rod 30 and is mounted around the first end 36 of the tie rod 30, in particular with a screw 44 located at the first end of the tie rod in the longitudinal direction X of the tie rod 30.
    In the embodiment shown, the foot 32 is a substantially tubular part forming a ring around the first end of the tie rod 30.
    The foot 32 defines at least two openings opening into the tie rod 30.
    The foot 32 is connected to the actuator 28. This in particular makes it possible to transmit a movement from the actuator 28 to the ejection element 26.
    The ejection element 26 also comprises a cooling system 46.
    The cooling system 46 is based on the circulation of a liquid, for example, water.
    The cooling system 46 has a cooling circuit extending in the tie rod 30 and the head 34, as visible in FIGS. 4 and 5.
    The cooling circuit in the tie rod 30 extends in the longitudinal direction X of the tie rod 30.
    In the embodiment shown, the cooling circuit comprises in the tie rod 30 an internal conduit 58 and an external conduit 60. The internal and external conduits 58, 60 are substantially concentric, the internal conduit 58 extending inside the external conduit 60.
    More particularly, the tie rod defines a hole opening at the second end 38 of the tie rod 30 and extending in the tie rod 30 in the longitudinal direction X, the orifice extending partially in the part of the tie rod 30 surrounded by the foot 32. The orifice has a substantially cylindrical shape with the exception of the part surrounded by the foot 32. At the level of the foot 32, the orifice has a diameter which is reduced until the orifice has the shape of a cylinder having a minimum diameter as a diameter. The orifice does not open at the first end 36 of the tie rod.
    A hollow tubular part 61 is inserted into said orifice in the longitudinal direction X, said part having an outside diameter substantially equal to the minimum diameter. The hollow tubular part 61 here extends at least from the second end 38 of the tie rod 30 to the part of the orifice having the minimum diameter as a diameter.
    The internal conduit 58 is formed by the interior of the hollow tubular part 61 and the part of the orifice having the minimum diameter as a diameter. The external conduit 60 is formed by the orifice from the second end 38 to the part (not included) of the orifice having a diameter equal to the minimum diameter and from the outside of the hollow tubular part 61.
    The arrangement of the internal and external conduits compared to two conduits side by side allows in particular a saving of space.
    The internal and external conduits 58, 60 extend in the longitudinal direction X.
    The cooling circuit comprises at least one liquid inlet 48 in the tie rod 30 arranged through the foot 32 and at least one liquid outlet 50 in the tie rod 30 arranged through the foot 32, as visible in FIG. 5.
    In the example shown, the cooling circuit comprises a single liquid inlet 48 and a single liquid outlet 50, the liquid inlet 48 and outlet 50 being in the tie rod 30 and arranged through the foot 32.
    The internal conduit 58 is connected to one of the liquid inlet 48 and the liquid outlet 50, more particularly here to the liquid inlet 48.
    The external conduit 60 is connected to the other among the liquid inlet 48 and the liquid outlet 50, more particularly here at the liquid outlet 50.
    The liquid outlet 50 of the cooling circuit is offset towards the head 34 relative to the liquid inlet 48.
    Alternatively, the liquid inlet 48 of the cooling circuit is offset towards the head 34 relative to the liquid outlet 50.
    The liquid inlet 48 and outlet 50 have a cylindrical shape in sections having a diameter which decreases on the way to the tie rod 30.
    The cylindrical sections are linked by chamfer.
    The inlet 48 and the outlet 50 respectively have an inlet direction and an outlet direction, each perpendicular to the longitudinal direction X. The liquid passing through the foot 32 flows in the direction of inlet or outlet.
    The direction of entry and the direction of exit are, for example, parallel.
    The inlet 48 and the outlet 50 of the liquid are formed, in order in the direction of the tie rod 30, by a separate part from the foot 32 and the tie rod 30 inserted in one of the openings defined by the foot 32 and described above, then by the rest of the opening passing through the foot 32 and finally through a hole in the tie rod 30 and opening into the internal 58 or external 60 conduit.
    The liquid inlet 48 and the liquid outlet 50 are substantially included in a first plane P, the link between the foot 32 and the actuator 28 being outside said first plane P. More particularly, the actuator 28 has at said link, an extension mainly in a direction perpendicular to said plane P, as shown in FIG. 3.
    This allows in particular that the liquid inlet 48 and outlet 50 and the actuator 28 are easily accessible, for example, for maintenance operations.
    The head 34 also comprises an internal circuit 62 forming part of the cooling circuit.
    The internal circuit 62 is shown in FIG. 4.
    The internal circuit 62 comprises a main path 68 and secondary paths 70.
    The internal circuit 62 has a head input 64 and a head output 66.
    The head inlet 64 and the head outlet 66 are located opposite the second end 38 of the tie rod 30.
    The head inlet 64 is connected to one of the internal conduit 58 and the external conduit 60, more particularly here to the internal conduit 58. The head outlet 66 is connected to the other among the internal conduit 58 and the conduit external 60, more particularly here to the external conduit 60.
    The head inlet 64 and the head outlet 66 are each connected to one end of the main path.
    The main path 68 here has a substantially triangular shape. At a vertex of said triangle, the sides are not joined so as to form the ends of the main road 68.
    From each vertex of the triangle outside the ends of the main road 68, two secondary paths extend, each secondary path extending in continuity with part of the main path.
    At least one secondary path opens into the molding wall 40. This allows in particular to send the coolant directly in contact with the formed part.
    The ejection device 18 also comprises at least one seal 52 between the head 34 and the tie rod 30 and / or at least one seal 54, 56 between the foot 32 and the tie rod 30.
    The ejection device 18 here comprises at least one, for example two, annular seals 52 between the head 34 and the tie rod 30. The seals 52 are arranged in openings provided in the tie rod 30 and facing the head 34.
    The seals 52 are located between the key 42 and each of the two from the head inlet 64 and the head outlet 66.
    The ejection device 18 here comprises at least one, for example two, first annular seals 54 and at least one, for example two, second annular seals 56 between the base 32 and the tie rod 30.
    The first and second seals 54, 56 are arranged in openings provided in the tie rod and facing the foot 32.
    The first seals 54 are located between the second end of the tie rod 38 and each of the two from the liquid inlet 48 and the liquid outlet 50.
    The second seals 56 are located between the first end of the tie rod 36 and each of the two from the liquid inlet 48 and the liquid outlet 50.
    The ejection element 26 is movable in translation in an ejection direction E between a retracted position visible in FIG. 1 and an ejection position visible in FIG. 2.
    In the retracted position, the head 34 of the ejection element 26 extends into contact 5 with the first mold part 14 of the tool.
    The molding wall 40 of the head forms a continuous surface with the forming walls 20, 22 to define the cavity 24.
    In the ejection position, at least part of the head 34 of the ejection element 26 projects from the first part 14 to the second part 16. The molding wall 40 of the head 34 is spaced from the forming wall 20 of the first part 14.
    The actuator 28 is able to move the ejection element 26 in the direction of ejection E between the retracted position and the ejection position.
    The integration of the liquid inlet 48 and the liquid outlet 50 directly through the foot makes it possible in particular not to have to provide space under the tie rod for an additional piece of liquid distribution. This therefore makes it possible to reduce the bulk while proposing a system for cooling the tool for producing a formed part.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. - Ejection device (18) for a tool for producing (10) a formed part (12), said ejection device (18) comprising an ejection element (26) and an actuator (28) , the ejection element (26) being movable in translation in an ejection direction (E) between a retracted position and an ejection position and the actuator (28) being able to move the ejection element (26) in the direction of ejection (E) between the retracted position and the ejection position, the ejection element (26) comprising a tie rod (30), a foot (32) and a head (34) , the tie rod (30) extending between a first end (36) and a second end (38), the head (34) being linked to the second end (38), the head (34) being designed to be in contact with the formed part (12), the foot (32) being connected to the actuator (28), the ejection element (26) comprising a cooling system (46), characterized in that the foot (32) surrounds the first end (36) of the tie rod (30) and in that the cooling system (46) has a cooling circuit extending in the tie rod (30) and the head (34), the cooling circuit comprising at least one liquid inlet (48) in the tie rod (30) arranged through the foot (32) and at least one liquid outlet (50) in the tie rod (30) ) arranged through the foot (32).
    [2" id="c-fr-0002]
    2, - Ejection device according to claim 1, characterized in that the cooling circuit comprises a single liquid inlet (48) and a single liquid outlet (50), the liquid inlet and outlet (48, 50) being in the tie rod (30) and arranged through the foot (32).
    [3" id="c-fr-0003]
    3. - Ejection device according to claim 1 or 2, characterized in that the liquid inlet (48) and the liquid outlet (50) are substantially included in a first plane (P), the link between the foot (32) and the actuator (28) being outside said first plane (P).
    [4" id="c-fr-0004]
    4, - Ejection device according to any one of claims 1 to 3, characterized in that the foot (32) is a separate part of the tie rod (30) mounted around the first end (36) of the tie rod (30) , in particular with a screw (44) located at the first end (36) of the tie rod (30) in a longitudinal direction (X) of the tie rod (30).
    [5" id="c-fr-0005]
    5. - ejection device according to any one of claims 1 to 4, characterized in that the head (34) is a separate part of the tie rod (30) mounted on the second end (38) of the tie rod (30), in particular by a key (42).
    [6" id="c-fr-0006]
    6. - Ejection device according to any one of claims 1 to 5, characterized in that the cooling circuit comprises in the tie rod (30) an internal conduit (58) and an external conduit (60), the internal conduits and external (58, 60) being substantially concentric, the internal conduit (58) being connected to one of the liquid inlet (48) and the liquid outlet (50) and the external conduit (60) being connected to the other among the liquid inlet (48) and the liquid outlet (50).
    [7" id="c-fr-0007]
    7. - Ejection device according to claim 6, characterized in that the internal conduit (58) is connected to the liquid inlet (48) and the external conduit (60) is connected to the liquid outlet (50) .
    [8" id="c-fr-0008]
    8. - Ejection device according to claim 6 or 7, characterized in that the head (34) comprises an internal circuit (62), the internal circuit (62) forming part of the cooling circuit, the internal circuit (62) having a head inlet (64) and a head outlet (66), the head inlet (64) being connected to one of the internal conduit (58) and the external conduit (60), the head outlet (66) being connected to each other among the internal conduit (58) and the external conduit (60).
    [9" id="c-fr-0009]
    9. - Ejection device according to any one of claims 1 to 8, characterized in that the liquid outlet (50) of the cooling circuit is offset towards the head (34) relative to the liquid inlet ( 48).
    [10" id="c-fr-0010]
    10. - Tool for producing (10) a formed part (12) comprising a first mold part (14), a second mold part (16) and an ejection device (18) according to any one of claims 1 to 9, the first and second mold parts (14, 16) each comprising a forming wall (20, 22), the first and second parts (14, 16) being movable in translation with respect to the further between an open position, in which the first and second parts (14, 16) are spaced from each other, and a closed position, in which the forming walls (20, 22) of the first and second parts (14, 16) partially define between them a cavity (24) having the shape of the part to be formed, the ejection element (26) of the ejection device (18) being movable relative to the first part of mold (14) of the tool (10) between the retracted position, in which the head (34) of the element ejection ment (26) extends in contact with the first part (14) and defines a molding wall (40), the molding wall (40) forming a continuous surface 5 with the forming walls (20, 22 ) to define the cavity (24), and the ejection position, in which at least a part of the head (34) of the ejection element (26) projects from the first part (14) towards the second part (16) and the molding wall (40) of the head (34) is spaced from the forming wall (20) of the first part (14).
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3073442B1|2019-11-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPH05253992A|1992-03-16|1993-10-05|Ikegami Kanagata Kogyo Kk|Core pin for mold|
    EP1661684A2|2004-11-26|2006-05-31|Hitachi Industrial Equipment Systems Co. Ltd.|Ejector with internal fluid path and moulding method|CN110497591A|2019-09-24|2019-11-26|创维集团智能装备有限公司|A kind of secondary ejecting mechanism and injection mold of injection mold|
    EP3708332A1|2019-03-13|2020-09-16|Comercial de Utiles y Moldes, S.A.|Device for demoulding negatives in thermoplastic injection moulds|
    WO2021130633A1|2019-12-23|2021-07-01|Adm S.R.L. Start Up Innovativa|Saber-like element for thermoplastic molds|
    FR3111838A1|2020-06-29|2021-12-31|Faurecia Interieur Industrie|Mold ejection device comprising a chain of sliding links and an adjustment shim|
    法律状态:
    2018-10-24| PLFP| Fee payment|Year of fee payment: 2 |
    2019-05-17| PLSC| Publication of the preliminary search report|Effective date: 20190517 |
    2019-10-22| PLFP| Fee payment|Year of fee payment: 3 |
    2020-10-21| PLFP| Fee payment|Year of fee payment: 4 |
    2021-10-20| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1760754A|FR3073442B1|2017-11-15|2017-11-15|EJECTION DEVICE FOR A TOOL FOR PRODUCING A FORMED PART WITH A COOLING SYSTEM|
    FR1760754|2017-11-15|FR1760754A| FR3073442B1|2017-11-15|2017-11-15|EJECTION DEVICE FOR A TOOL FOR PRODUCING A FORMED PART WITH A COOLING SYSTEM|
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