• 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 device for the demolding of pieces comprises a shoe (1) comprising a slide (8) to receive a figure insert (2) for molding a negative (10) of the piece to be molded, said slide being associated (8). ) to a push bar (9) obliquely, which can move said slide (8) to an ejection position of a piece to be molded, and is characterized in that said push rod (9) comprises at its upper end a rack (21), which meshes with another rack (22) of said slide (8), the movement of said push rod (9) being transferred to said slide (8) through said racks (21, 22). It allows reducing the volume with respect to the device described in the aforementioned document, so that it is less dimensionally invasive in its assembly within the figure of the mold. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2542024A1
    申请号:ES201430098
    申请日:2014-01-28
    公开日:2015-07-29
    发明作者:Alberto Navarra Pruna
    申请人:Comercial de Utiles y Moldes SA；
    IPC主号:
    专利说明:

    DESCRIPTION

    Device for demolding parts.

    The present invention relates to a device for the demoulding of parts, which houses a figure insert that forms the negatives in injection molds. It is a device designed to replace the current inclined skates.

    Background of the invention
     10
    Currently in the field of injection molds, mainly those of a considerable size (read molds for the automotive sector, or similar) and for obtaining molded parts in plastic material, whose configuration has negative areas that can not be molded by the conventional extraction system, the use of angular displacement skates associated with the mold is required, so as to facilitate the demolding of these negative parts during the extraction process.

    Normally and depending on the refusal to mold, the path of these skates does not need to be the same as the path of the ejectors that unmold the piece in question. For this reason, most of these molds require the use of a double set of ejector plates. twenty

    These ejector plates use the same movement of movement for the two groups of ejection plates, but by means of duly incorporated mechanisms, we achieve that after a certain path, the first group of ejector plates is stopped, while the second group continues to move until required travel limit 25 for total removal of the molded part.

    The first group of ejector plates normally incorporates all the angular displacement mechanisms, while the second group of ejector plates incorporates all the ejectors that make possible the complete expulsion of the molded product in question. 30

    This system, mainly motivated by the effort required to make one or more angular demoulding elements act, requires ejector plates properly sized.
     35
    As they are angular displacement mechanisms, the space they require for installation in many cases forces us to look for more or less cumbersome alternatives due to the space needed to reinforce the efforts required in each case. Consequently, global dimensions of the mold of larger dimensions are required, with the consequent material costs such as hours of machining. Likewise, on many occasions an injection machine of greater capacity is necessary, only because of the dimensions of the mold, not because of the weight of the piece.

    All this greatly increases the mold, as well as on many occasions the machines that make machining possible, which must be properly adapted to these needs.

    Being large molds, normally these negative parts also occupy an important part of the figure to be molded, and in these cases it is essential to incorporate cooling elements to accelerate the cooling of molded mass 50 by injection of molten plastic .

    Therefore, to be unmold the piece must be cooled before its expulsion process, since at the time of injection the material enters the cavity of the mold in
    semi-chaste state, and to be expelled through the ejectors we must have the cold and rigid material.

    The cooling process in the plastic molds is achieved by means of internal circuits that are machined in the mold, where cold water is circulated, thus achieving a thermal jump that allows the hardening of the molded part to be accelerated.

    To solve these problems, the device described in document ES 2398793 A1, of the same owner as the present application, was incorporated and incorporated here by reference.
     10
    The purpose of the device according to the present invention with respect to the device described in said document is to reduce the volume of the device, so that it is less dimensionally invasive during assembly within the mold.

    Description of the invention

    With the device for demoulding parts of the invention, the aforementioned drawbacks are resolved, presenting other advantages that will be described below.

    The device for the demoulding of parts in a mold according to the present invention comprises a skate comprising a slide for housing a figure insert for the molding of a negative of the piece to be molded, said slide being associated with a bar of pushing obliquely, said slide being able to move to an ejection position of a piece to be molded, and characterized in that said push bar comprises at its upper end a rack, which meshes with another rack of said slide, 25 transferring the movement of said push bar to said slide through said zippers.

    Advantageously, said skate comprises a base on which said slide slides along guides of said base complementary with grooves of said slide. 30

    Preferably, said guides are positioned inclined with respect to the longitudinal axis of said base, and are placed inside a hole of said base, inside which said slide is housed.
     35
    In addition, said slide is also preferably positioned inclined with respect to said push bar.

    According to a preferred embodiment, said slide rack is positioned with its teeth perpendicular to the longitudinal axis of the slide, and the teeth of said rack of the push bar are positioned perpendicular or inclined with respect to the longitudinal axis of the push bar.

    Preferably, said push bar comprises a magnet associated with a magnetic detector to detect the position of the push bar. Four. Five

    The device for the demoulding of parts in a mold according to the present invention allows to reduce the volume with respect to the device described in the aforementioned document, so that it is less dimensionally invasive in its assembly within the mold figure. fifty

    Brief description of the drawings

    For a better understanding of how much has been exposed, some drawings are attached in which,
    schematically and only by way of non-limiting example, a practical case of embodiment is represented.

    Figure 1 is an exploded perspective view of the device for demoulding parts according to the present invention; and 5

    Figure 2 is a schematic elevational view of the device for demolding parts of the present invention.

    Description of a preferred embodiment 10

    First of all, it should be noted that the device for the demoulding of parts of the present invention is designed for use in large molds, for example in molds of more than 800 kg, such as they could be, but not limited to, for car panels, for car doors or roofs, large 15-dimensional appliances, etc. where it is necessary to perform internal negatives.

    Said device for the demoulding of parts of the present invention comprises a skate 1 provided in its upper part with a base 3 on which a slide 8 slides. Said base 3 is attached to the mold by means of fixing screws. twenty

    Said device also comprises a hairpiece of figure 2 removably fixed on said slide 8 by means of screws 20, whose hairpiece 2 is the one that molds a negative or projection in the desired shape. Obviously, said insert 2 can be removed and a different insert placed to mold a piece with a different inner projection. 25

    Said insert 2 is the element in which the shape of the negative to be reproduced in the plastic piece is machined. This insert 2 is capable of incorporating the most suitable cooling circuit to its geometry, to optimize the cooling speed of the piece to be molded to the maximum. 30

    It should be noted that in the so-called small molds within the molding technique the hairpieces are attached laterally to the slide, that is, the hairpiece is placed next to the skate and not on it. To allow the identification of the mold as large by a person skilled in the art, the present description indicates that the insert is placed or fixed on the skate.

    Skate 1 of the device of the present invention also comprises a push bar 9 located substantially vertically in the mold. Said push bar 9 moves said insert 2 between a closed position and an open or ejected position of the mold. 40

    As can be seen in Figure 2, said slide 8 is positioned obliquely with respect to the push bar 9.

    In accordance with the present invention, said push bar 9 comprises at its upper end 45 a rack 21, which meshes with another rack 22 of said slide 8, the movement of said push rod 9 being transferred to said slide 8 through said zippers 21, 22.

    Due to the oblique arrangement of said slide 8 with respect to the push bar 9, said 50 zippers 21, 22 move on themselves but with different angles, which allows divergent displacements in the direction of their sliding.

    The slide 8 slides along guides 23 of said base 3 complementary with
    slots 24 of said slide 8. Said guides 23 are positioned inclined with respect to the longitudinal axis of said base 3 and are placed inside a hole 26 of said base 3, inside which said slide 8 is housed.

    One of the zippers 21 acts as a driving rack, since it is coupled to the ejector plate 5 (not shown in the drawings) of the mold, which drives the ejection movement. The other rack 22 moves freely, so that this rack 22 moves along said guides 23 by the drive of the drive rack 21, converting the vertical offset of the rack 21 into an angular displacement.
     10
    The combination of the machining of the teeth of the zippers 21, 22 determine the divergent angles of operation that in each case are necessary to apply according to the negatives of the moldings that the figure to be molded may require.

    As can be seen in the figures, the rack 22 of the slide 8 is placed with its teeth perpendicular to the longitudinal axis of the slide 8, while the teeth of the drive rack 21 of the push bar 9 are positioned perpendicular or inclined with respect to the longitudinal axis of the push bar 9.

    Thus, for demolding perpendicular to the opening and closing movement of the mold, the teeth of the drive rack 21 will be positioned perpendicular to the longitudinal axis of the push bar 9 or to the ejection movement, while those of the other rack 22 will have a corresponding inclination to guarantee a perfect sliding coupling.
     25
    For demoulding with angles outside the perpendicular of the opening and closing movement of the mold, the teeth of the drive rack 21 will be positioned with the necessary release angle for each case, while those of the other rack 22 will also have a corresponding inclination to guarantee a perfect sliding coupling, but adding or subtracting the same degrees that the demolding angle deviates from the perpendicular.

    In addition, said push bar 9 also comprises a magnet 27 associated with a magnetic detector 25 to detect the position of the push bar 9.
     35
    Although reference has been made to a specific embodiment of the invention, it is apparent to one skilled in the art that the described demoulding device is susceptible to numerous variations and modifications, and that all the mentioned details can be replaced by others technically equivalent, without departing from the scope of protection defined by the appended claims. 40
    权利要求:
    Claims (8)
    [1]

    1. Device for the demoulding of parts in a mold, comprising a skate (1) comprising a slide (8) to accommodate a insert of figure (2) for the molding of a negative (10) of the piece to be molded, said slide (8) being associated with a 5-push bar (9) obliquely, which can move said slide (8) to an ejection position of a piece to be molded, characterized in that said push bar (9) comprises its upper end a rack (21), which meshes with another rack (22) of said slide (8), the movement of said push bar (9) being transferred to said slide (8) through said zippers (21, 22 ). 10

    [2]
    2. Device for demolding parts in a mold according to claim 1, wherein said skate (1) comprises a base (3) on which said slide (8) slides along guides (23 ) of said base (3) complementary with grooves (24) of said slide (8). fifteen

    [3]
    3. Device for demoulding parts in a mold according to claim 2, wherein said guides (23) are positioned inclined with respect to the longitudinal axis of said base (3).
     twenty
    [4]
    4. Device for demolding parts in a mold according to claim 2 or 3, wherein said guides (23) are placed inside a hole (26) of said base (3), inside which houses said slide (8).

    [5]
    5. Device for demolding parts in a mold according to claim 1, wherein said slider (8) is positioned inclined with respect to said push bar (9).

    [6]
    6. Device for demolding parts in a mold according to claim 1 or 5, wherein said rack (22) of the slide (8) is positioned with its teeth perpendicular to the longitudinal axis of the slide (8). 30

    [7]
    7. Device for demolding parts in a mold according to claim 1, wherein the teeth of said rack (21) of the push bar (9) are placed perpendicular or inclined with respect to the longitudinal axis of the bar push (9).
     35
    [8]
    A device for demolding parts in a mold according to claim 1, wherein said push bar (9) comprises a magnet (27) associated with a magnetic detector (25) to detect the position of the bar of push (9).
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS6294319A|1985-10-21|1987-04-30|Fanuc Ltd|Apparatus for automatic unloading of product in injection molding machine|
    DE10128875A1|2001-06-15|2002-12-19|Schaufler Gmbh & Co Werkzeugba|Mechanism for demolding an undercut on a molded vehicle oil pan incorporates two racks which are actuated by a toothed shaft|
    JP2009298091A|2008-06-17|2009-12-24|Fanuc Ltd|Detector for detecting abnormality of ejector of injection molding machine|
    JP2011136512A|2009-12-28|2011-07-14|Fanuc Ltd|Ejector control unit of injection molding machine|
    CN201989304U|2010-11-15|2011-09-28|郑恬晨|Die and ejection mechanism thereof|
    CN103448217A|2013-08-30|2013-12-18|宁波双林模具有限公司|Oblique core pulling demoulding device for driving helical racks|ES2625252A1|2016-01-18|2017-07-19|Comercial de Útiles y Moldes, S.A.|Device for the demolding of parts and mold comprising said device |
    CN112277268A|2020-10-09|2021-01-29|常州安康医疗器械有限公司|Degradable tissue clamp mold demoulding device|US1349122A|1920-04-23|1920-08-10|Doehler Die Casting Co|Die-casting apparatus|
    GB1381114A|1971-06-01|1975-01-22|Codd D T|Mechanical transmission coupling to transmit rectilinear forceand movement|
    DE2917799C2|1979-05-03|1981-04-23|HASCO-Normalien Hasenclever & Co, 5880 Lüdenscheid|Plastic injection mold or compression mold with a displaceably guided molded part|
    CS254160B1|1985-07-18|1988-01-15|Jan Soos|Shifting mechanism|
    US5518679A|1995-01-17|1996-05-21|Sta-Rite Industries, Inc.|Method and apparatus for making a component having interior and exterior threads|
    JP2987133B2|1997-04-25|1999-12-06|日本電産コパル株式会社|Axial fan and method for manufacturing blade of axial fan and mold for manufacturing blade of axial fan|
    US6450797B1|2001-03-01|2002-09-17|Stackteck Systems Limited|Compact slide actuation mold|
    DE202004010812U1|2004-07-10|2004-09-30|Demag Ergotech Gmbh|Injection molding machine with integrated path measuring system|
    ES2398793B1|2012-11-27|2014-02-10|Comercial de Útiles y Moldes, S.A.|Parts demoulding device|US11059203B2|2016-04-19|2021-07-13|Technocrats Corporation|Undercut processing mechanism, molding die and molded product|
    FR3053269B1|2016-06-30|2018-08-17|Faurecia Interieur Industrie|DEVICE FOR EJECTING A PIECE FORMED ON A MOLD PART AND ASSOCIATED TOOL|
    IT201800003877A1|2018-03-22|2019-09-22|Ermanno Balzi S R L|EXTRACTOR DEVICE FOR MOLDS|
    CN109551720B|2018-11-05|2020-05-05|浙江工商职业技术学院|Double-inner-side core-pulling mechanism of movable die driven fixed die|
    CN111558706B|2020-04-14|2021-11-16|宇龙计算机通信科技有限公司|Pitched roof demolding mechanism and casting mold|
    法律状态:
    2016-05-12| FG2A| Definitive protection|Ref document number: 2542024 Country of ref document: ES Kind code of ref document: B1 Effective date: 20160512 |
    优先权:
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    ES15382015.4T| ES2672570T3|2014-01-28|2015-01-27|Device for unmolding parts|
    EP15382015.4A| EP2899010B1|2014-01-28|2015-01-27|Device for demolding parts|
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    HK15111009.9A| HK1210104A1|2014-01-28|2015-11-09|Device for demolding parts|
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