WO2009133130A1 - Dispositif de moulage pour la fabrication de corps creux moulés avec projectile sans symétrie de rotation - Google Patents

Dispositif de moulage pour la fabrication de corps creux moulés avec projectile sans symétrie de rotation Download PDF

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Publication number
WO2009133130A1
WO2009133130A1 PCT/EP2009/055178 EP2009055178W WO2009133130A1 WO 2009133130 A1 WO2009133130 A1 WO 2009133130A1 EP 2009055178 W EP2009055178 W EP 2009055178W WO 2009133130 A1 WO2009133130 A1 WO 2009133130A1
Authority
WO
WIPO (PCT)
Prior art keywords
projectile
radial
longitudinal axis
casting
radial projection
Prior art date
Application number
PCT/EP2009/055178
Other languages
German (de)
English (en)
Inventor
Devid Mosca
Original Assignee
Röchling Automotive AG & Co. KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Röchling Automotive AG & Co. KG filed Critical Röchling Automotive AG & Co. KG
Priority to JP2011506699A priority Critical patent/JP5361992B2/ja
Publication of WO2009133130A1 publication Critical patent/WO2009133130A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C2045/0087—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor making hollow articles using a floating core movable in the mould cavity by fluid pressure and expelling molten excess material

Definitions

  • Casting device for producing hollow cast articles with non-rotationally symmetrical projectile
  • the present invention relates to a casting apparatus for producing hollow cast articles, comprising a cavity, a filling device for filling flowable casting material into the cavity, a displacement device which is designed to project, preferably through, a projectile for movement into the casting material filled in the cavity therethrough, with the projectile extending along a projectile longitudinal axis.
  • Such a device is known, for example, from EP 0 757 936 A.
  • a casting apparatus disclosed in the cited document as an injection molding apparatus, is used to first fill a cavity with flowable casting material and subsequently displace casting material filled into the cavity partially through the projectile, which is driven for movement by the casting material. 2o
  • the motion drive takes place through a fluid ejection nozzle, which directs fluid under pressure to a projectile provided and this drives it.
  • the projectile During the passage of the projectile through the casting material filled into the cavity, the projectile generally produces a cavity whose cross-section approximates a projection of the projectile in projectile longitudinal axis.
  • This object is achieved by a generic casting device, wherein the projectile has a non-rotationally symmetrical cross section at least in an axial contour section of its longitudinal extent.
  • This cross-section is to be considered in a cross-sectional plane orthogonal to the projectile longitudinal axis.
  • the filling device is designed to fill flowable casting material into the cavity, this should also include only a partial filling of the cavity with casting material, since the casting material should not be excluded a filled part of the cavity is displaced by the projectile and its movement into the initially unfilled portion of the cavity.
  • the axial longitudinal section of the projectile which has a non-rotationally symmetrical cross section, is referred to in the present application as a "contour section".
  • the contour section is preferably arranged and configured such that a virtual enveloping cylinder surrounding the projectile radially outwardly with the projectile longitudinal axis as the cylinder axis forms the projectile touched in the region of its contour section.
  • envelope cylinder here refers to a merely imaginary cylinder whose cylinder axis coincides with the projectile longitudinal axis and whose diameter is chosen such that it touches the point of the projectile which is located farthest away from the projectile longitudinal axis as a tilting cylinder.
  • One particularly frequently desired contouring of the inner surface of the produced hollow cast article is a groove extending longitudinally of the cast article which can be advantageously produced by having the projectile having a projectile core with a projectile jacket, the projectile jacket extending at least one from the projectile longitudinal axis Having radially away extending radial projection.
  • the inner surface of the hollow cast article to be produced with a in the longitudinal direction Forming a projecting projection this can be achieved with the aforementioned projectile in that its projectile jacket has at least one radial recess extending radially toward the projectile longitudinal axis.
  • projectile core refers to a radially outwardly projecting outer surface of the projectile, with a portion of the outer surface facing radially outward when its normal vector is one the projectile longitudinal axis has radially outwardly facing component.
  • the radial height of the radial projection and / or the radial depth of the radial recess based on the projectile core without radial projection or / and radial recess, at least partially changes in the axial direction.
  • the radial height of the radial projection at least partially increases in the axial direction from the leading end of the projectile to its trailing end, wherein particularly preferably the radial height of the radial projection increases in the axial direction continuously and without steps.
  • the projectile may rotate about its projectile longitudinal axis. Nevertheless, satisfactory results can be achieved with the projectile described above if a defined contoured inner shape of the hollow cast article to be produced is required only in the region of its end region near the projectile stop position. This may be the case if the internal contouring, for example on a pipe, the connection with a pipe in the following longitudinal axis Object is used, which penetrates only along a certain depth of penetration of said longitudinal end ago in the generated hollow cast article.
  • the above-mentioned undesirable turning of the projectile around its longitudinal axis as it passes through the cavity can also be reduced or even prevented along the entire projectile trajectory in that at least one radial projection serves as a stabilizer rib, which passes through the cavity when passing the projectile their associated guide recess interacts.
  • the guide recess guides the projectile by means of the stabilizer rib, which protrudes radially into the guide recess. It is particularly advantageous if a recess already present in the cavity for shaping the casting object can be used as a guide recess.
  • a solidified layer of casting material also forms on the guide recess, covering the wall regions of the guide recess, so that movement of the stabilizer rib as it passes through the cavity in the Essentially in the circumferential direction around the projectile trajectory is positively limited by the guide recess or the layers of solidified thereon casting material without undesirably high flow resistance.
  • the guide recess optionally in conjunction with the hardened G manmaterial Anlagenen adjacent thereto, thus forms a rotation of the projectile against rotation about its longitudinal axis, namely substantially over the entire projectile trajectory.
  • a particularly stable and secure guidance can be obtained according to an advantageous development of the present invention, characterized in that the stabilizer rib substantially over the entire axial length of the projectile.
  • a particularly wide variety of different possible designs of the projectile-generated inner surface of the hollow cast article can be obtained by having at least one radial projection, viewing a cross-section in a cross-sectional plane orthogonal to the projectile longitudinal axis, at least in an axial section of the projectile and at least in a radial section of the radial projection has a radially varying width.
  • the width is to be measured in the circumferential direction around the projectile longitudinal axis.
  • Such depending on the radial position widths of the radial projection are of particular interest in the region of its radially outer end, since they form the base of the groove produced by the respective radial projection. If it is desired to reduce the flow resistance of the projectile when passing through the casting material, then the radial projection can advantageously be designed such that it tapers towards its radially outer end.
  • the radial projection when viewing a cross-section in a cross-sectional plane orthogonally to the projectile longitudinal axis, at least in an axial portion of the projectile and at least in the region of its radially outer end have a triangular, trapezoidal or rectangular shape, preferably with rounded corners.
  • the positional stability of the projectile during its movement through the casting material filled into the cavity can be further improved in that the transitions from the projectile core to the radial projection are rounded in the circumferential direction. Sharp-edged transitions from the projectile core to the radial projection can cause unwanted turbulence or flow separation, which could cause the projectile to spin.
  • a particularly high precision of a radial projection in the higher formed groove casting can be achieved in that the radial projection over as large an axial length as possible in contact with the casting material.
  • the radially outer end of the respective radial projection projects beyond the projectile core in the axial direction to a greater extent than radially inwardly located sections of the radial projection, since the radially outer end is usually designed with a small width in the circumferential direction about the projectile longitudinal axis and thus, despite its length, does not generate excessively high flow resistance.
  • the shape of an inner surface of a hollow cast article to be formed may be chosen in almost any manner when the projectile comprises a plurality of radial protrusions and / or radial recesses.
  • the majority of radial projections and / or radial recesses are arranged equidistantly in the circumferential direction around the projectile longitudinal axis.
  • the radial projections and / or radial depressions are arranged in the circumferential direction at different distances from each other.
  • the projectile comprising a plurality of radial projections and / or radial recesses, of which at least two radial projections and / or radial recesses, when viewed in cross-section and the same to the projectile longitudinal axis orthogonal cross-sectional plane different radial dimensions and / or different widths in the circumferential direction around the Projectile longitudinal axis and / or have a different width change in the radial direction.
  • the present casting device should be operable with any casting materials.
  • the casting device described above is preferably an injection molding device which processes thermoplastic as casting material.
  • the above object of the present invention is also achieved by a projectile for an injection molding process with projectile injection technology, which is designed according to at least one of the above-mentioned aspects. Since such a projectile is an independently tradable good, the Applicant seeks independent patent protection for the building on the same inventive idea projectile.
  • the projectile advantageously tapers along its projectile longitudinal axis to its leading longitudinal end.
  • FIG. 1 is a perspective view of a projectile of a casting device according to the invention obliquely from behind
  • FIG. 2 is a side view of the projectile of FIG. 1; FIG.
  • Fig. 3 is a rear view of the projectile of Figures 1 and 2 and
  • FIGS. 1 to 3 shows a cross-section of a hollow cast object produced by means of a casting device according to the invention and the projectile of FIGS. 1 to 3.
  • a projectile for use in a casting device according to the invention is designated generally by 10.
  • the projectile 10 extends along a projectile longitudinal axis 12 with a projecting in projectile direction B longitudinal end 14 and a trailing longitudinal end 16th
  • the projectile has a projectile core 18 which is substantially rotationally symmetrical in the example of FIGS. 1 to 3 and has a projectile jacket 20.
  • the projectile core 18 is the part of the projectile 10 located radially inside the lines 22, 24 and 26.
  • the projectile jacket 20 has a first region 20a, which also includes the leading longitudinal end 14 of the projectile 10, in which the projectile 10, in particular the projectile core 18, tapers in the direction of the projectile longitudinal axis 12 to the leading longitudinal end 14 of the projectile 10. Furthermore, the projectile jacket 20 has a second section 20b in which at least the projectile core 18 has a substantially cylindrical outer shell or, more generally, an outer shell whose cross section does not change along the same axis orthogonal to the projectile longitudinal axis 12. The boundary between regions 20a and 20b is shown by dashed line 28.
  • radial projections on the projectile core 18 are formed radially outward.
  • two essentially identical radial projections 30 and 32 lie diametrically opposite one another relative to the projectile longitudinal axis 12.
  • a third radial projection 34 which extends farther radially outward than the first two radial projections 30 and 32 is located circumferentially about the projectile longitudinal axis 12 closer to the radial projection 32 than the radial projection 30th
  • All the radial projections 30, 32 and 34 like the projectile 10 itself, have a first region 30a, 32a and 34a in which their radial height he related to the projectile core 18 along the projectile longitudinal axis 12 from the leading longitudinal end 14 away to the trailing longitudinal end 16 of the projectile 10 gradually and continuously increased.
  • first region and the second region of the radial projections 30, 32 and 34 are marked with dashed lines around the projectile longitudinal axis 12 partially, for the radial projection 30 with a dashed line 36, for the radial projection 32 with a dashed line Line 38 and for the radial projection 34 with a dashed line 40th
  • the radial projections 30 and 32 are formed substantially triangular in cross-section and are limited at least in the region of its radially outer end by substantially flat surfaces.
  • a concave curve 42 or 44 is respectively formed at the foot of the radial projections 30 and 32 located at the projectile core 18, with which a substantially smooth, smooth transition is provided by the projecting in the circumferential direction of the projectile 10 projectile core 18 to the substantially flat boundary surfaces of the radial projections 30 and 32.
  • the peripheral region of the curves 42 and 44 is characterized by dashed lines in its circumferential extent.
  • the radial projection 34 is delimited by a curved outer surface, which projects completely clings to the Russianivem 18 and thus forms a smooth transition.
  • the peripheral region in which the radial projection 34 extends on the projectile core 18 is indicated by a dashed line 46.
  • the radial projection 34 extends almost the entire axial length of the projectile 10, so that the contour portion 48 extends over almost the entire axial length of the projectile.
  • the radial projection 34 with its significantly larger radial extent compared to the radial projections 30 and 32 serves in the example shown in Figures 1 to 3 as a stabilizer rib, which in the movement of the projectile 10 through a cavity of a casting mold with a radial projection 34 associated guide recess the cavity interacts to prevent or at least reduce rotation of the projectile 10 about its projectile longitudinal axis 12 as it moves through the cavity.
  • the substantially identically constructed radial projections 30 and 32 are formed axially shorter, although they extend to the trailing
  • an enveloping cylinder 50 is indicated, the cylinder longitudinal axis 52 coincides with the projectile longitudinal axis 12 and which contacts the projectile 10 at its in the radial direction of the projectile longitudinal axis 12 furthest point 54 as a tilting cylinder.
  • areas 56, 58, 60 and 62 can be seen in the region of the trailing longitudinal section 16 of the projectile 10, which serve to receive the projectile on a fluid ejection nozzle.
  • FIG. 4 shows the non-hatched cross-section of a cross-section with a cross-section according to the invention.
  • ó injection molding device produced tube shown with contoured inner shape.
  • the component is designated 64.
  • a located between the grooves 68 and 70 deeper groove 72 has been formed by the radial projection 34, wherein a projection 74 of the component 64 forming mold cavity of the component 64 as a whole forming cavity as a guide recess with the radial projection 34 for inhibiting a rotational movement of the projectile 10 to its projectile longitudinal axis 12 has cooperated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

L'invention porte sur un dispositif de moulage pour la fabrication de corps creux moulés qui comprend une cavité, un dispositif de remplissage pour amener un matériau de moulage fluide dans la cavité, un dispositif de refoulement conçu pour propulser un projectile (10) afin qu'il pénètre à l'intérieur du matériau de moulage dont est remplie la cavité, de préférence en le traversant, le projectile s'étendant le long d'un axe longitudinal du projectile (12) et le projectile (10) présentant une section sans symétrie de rotation au moins dans un segment axial du contour (48) sur son extension longitudinale.
PCT/EP2009/055178 2008-04-30 2009-04-29 Dispositif de moulage pour la fabrication de corps creux moulés avec projectile sans symétrie de rotation WO2009133130A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011506699A JP5361992B2 (ja) 2008-04-30 2009-04-29 非回転対称のプロジェクティルを用いて中空のキャスティング物品を製造するためのキャスティング装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008021592.9 2008-04-30
DE200810021592 DE102008021592C5 (de) 2008-04-30 2008-04-30 Gießvorrichtung zur Herstellung hohler Gussgegenstände mit nicht-rotationssymmetrischem Projektil

Publications (1)

Publication Number Publication Date
WO2009133130A1 true WO2009133130A1 (fr) 2009-11-05

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PCT/EP2009/055178 WO2009133130A1 (fr) 2008-04-30 2009-04-29 Dispositif de moulage pour la fabrication de corps creux moulés avec projectile sans symétrie de rotation

Country Status (3)

Country Link
JP (1) JP5361992B2 (fr)
DE (1) DE102008021592C5 (fr)
WO (1) WO2009133130A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012224083A (ja) * 2011-04-14 2012-11-15 Roechling Automotive Ag & Co Kg 中空成型品の製造のための成型デバイスおよび成型方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2113360B1 (fr) * 2008-04-30 2013-07-17 Röchling Automotive AG & Co. KG Dispositif de coulée doté d'une cavité annexe pouvant être chauffée
JP5242486B2 (ja) * 2009-04-10 2013-07-24 アァルピィ東プラ株式会社 中空体の製造方法
DE102014226500A1 (de) * 2014-12-18 2016-06-23 Volkswagen Aktiengesellschaft Verfahren zur Herstellung eines Hohlkörpers aus Kunststoff sowie Projektil zur Verwendung in diesem Verfahren
DE102015225938A1 (de) 2015-12-18 2017-06-22 Kautex Textron Gmbh & Co. Kg Verfahren zur Herstellung eines Rohres sowie Spritzgießvorrichtung

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JPH07108562A (ja) * 1993-10-12 1995-04-25 Aaru Pii Toupura Kk ゴルフクラブシャフトの成形方法
JPH10180812A (ja) * 1996-12-26 1998-07-07 Asahi Chem Ind Co Ltd フローティングコアによる中空体成形方法
ES2228240A1 (es) * 2003-01-29 2005-04-01 Antonio Carrasco Rubio Sistema de inclusion de objetos en bloques de resina o similares.

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JPH0720646B2 (ja) * 1990-11-30 1995-03-08 アァルピィ東プラ株式会社 中空体の製造法
JPH09123212A (ja) * 1995-10-31 1997-05-13 Asahi Chem Ind Co Ltd 二層中空成形品及びその成形方法
JP3462290B2 (ja) * 1995-02-23 2003-11-05 アァルピィ東プラ株式会社 中空成形装置
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EP0757936B1 (fr) * 1995-02-23 2001-09-12 Rp Topla Limited Procede et appareil de moulage de cet article creux
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JPH07108562A (ja) * 1993-10-12 1995-04-25 Aaru Pii Toupura Kk ゴルフクラブシャフトの成形方法
JPH10180812A (ja) * 1996-12-26 1998-07-07 Asahi Chem Ind Co Ltd フローティングコアによる中空体成形方法
ES2228240A1 (es) * 2003-01-29 2005-04-01 Antonio Carrasco Rubio Sistema de inclusion de objetos en bloques de resina o similares.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012224083A (ja) * 2011-04-14 2012-11-15 Roechling Automotive Ag & Co Kg 中空成型品の製造のための成型デバイスおよび成型方法

Also Published As

Publication number Publication date
JP2011518698A (ja) 2011-06-30
DE102008021592B3 (de) 2009-12-31
DE102008021592C5 (de) 2013-05-02
JP5361992B2 (ja) 2013-12-04

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