EP1853413A1 - Procede de moulage d'un boyau profile sur un vitrage - Google Patents

Procede de moulage d'un boyau profile sur un vitrage

Info

Publication number
EP1853413A1
EP1853413A1 EP05739456A EP05739456A EP1853413A1 EP 1853413 A1 EP1853413 A1 EP 1853413A1 EP 05739456 A EP05739456 A EP 05739456A EP 05739456 A EP05739456 A EP 05739456A EP 1853413 A1 EP1853413 A1 EP 1853413A1
Authority
EP
European Patent Office
Prior art keywords
glazing
molding
outlet
injection
injection head
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
EP05739456A
Other languages
German (de)
English (en)
French (fr)
Inventor
Guy Leclercq
Thierry Thuillier
Fabrice Ducreuzot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
Original Assignee
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
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 Saint Gobain Glass France SAS, Compagnie de Saint Gobain SA filed Critical Saint Gobain Glass France SAS
Publication of EP1853413A1 publication Critical patent/EP1853413A1/fr
Ceased legal-status Critical Current

Links

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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • B29C45/2708—Gates
    • B29C45/2711—Gate inserts
    • 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
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating 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
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
    • 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
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
    • B29C31/041—Feeding of the material to be moulded, e.g. into a mould cavity using filling or dispensing heads placed in closed moulds or in contact with mould walls
    • 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
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • 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
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article
    • B29C45/14434—Coating brittle material, e.g. glass
    • 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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • 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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • B29C45/2708—Gates
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/74—Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding
    • B29C70/76—Moulding on edges or extremities of the preformed part
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/74—Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding
    • B29C70/76—Moulding on edges or extremities of the preformed part
    • B29C70/763—Moulding on edges or extremities of the preformed part the edges being disposed in a substantial flat plane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J10/00—Sealing arrangements
    • B60J10/70—Sealing arrangements specially adapted for windows or windscreens
    • 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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2756—Cold runner channels
    • 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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/278—Nozzle tips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/778—Windows
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/2419—Fold at edge
    • Y10T428/24198—Channel-shaped edge component [e.g., binding, etc.]

Definitions

  • the present invention relates to a method of molding a profiled casing made of a plastic material formed of several components, in particular a polyurethane-based material, on at least one peripheral portion of a glazing using at least one injection head, wherein said material ejected from an outlet of the injection head then enters a mold cavity to form said molded shaped casing.
  • the present invention also relates to the device for implementing the method and the glazing obtained by the implementation of the method.
  • This intermediate means was intended to allow the reactive mixture to flow into the mold in a laminar manner and without forming bubbles.
  • This mixing cavity and / or homogenization, located before the molding cavity by considering the direction and direction of injection of the material is sometimes called “injection cone” or “injection blade” or “carrot injection” or
  • This cavity is sometimes provided with a throttling portion, that is to say a portion where its section is reduced.
  • the injected material is a thermosetting material
  • all the material present in the intermediate means must be discarded because it can not be recycled.
  • the quantity The amount of material present in this intermediate means may represent up to one-third of the total amount of material injected into the mold cavity for the manufacture of the molded casing.
  • the connection zone between the material in the intermediate means and the material forming the molded casing sometimes called the "injection threshold" of the product, must be subjected to a finishing step by cutting the burrs and then Sanding the cut areas to hide the difference in appearance of the part in this area, because the break between the two parts of the material is never smooth and straight. This step being difficult to automate, its realization by hand generates an additional cost during manufacture.
  • This injection threshold being furthermore sometimes positioned at the end of a lip of the profiled hose, this step must be carried out carefully so as not to damage the lip during the cutting of the burrs and the sanding.
  • the cavity for mixing and / or homogenization is generally hollowed out in one of the constituent parts of the mold. The presence of this cavity thus makes more complex the study prior to the production of the mold and the manufacture of the mold. The presence of this cavity and generates additional cost during the design of the mold.
  • Such complex configurations obviously generate a significant additional cost during the study prior to the production of the mold and during the manufacture of the mold.
  • EP 629 482 an injection channel of a particular type.
  • the object of the invention is to overcome the disadvantages of the prior art by proposing a multi-component material injection process which no longer requires the presence of an intermediate means as defined above and whose means for to implement it are thus simpler and less expensive to design and use.
  • the inventors have found that, surprisingly, it was quite possible to inject the material directly into the molding cavity, without passing the material through an intermediate means.
  • the present invention thus relates in its broadest sense to a method of molding a shaped casing made of a plastic material formed of several components, in particular a polyurethane-based material, on at least one peripheral portion of a glazing unit with at least one injection head, wherein said material ejected from an outlet of the injection head then enters a mold cavity to form said molded shaped casing, characterized in that the material ejected by said outlet of the injection head penetrates directly into said mold cavity.
  • This molding cavity is delimited by molding walls between which the injected material spreads as well as the glazing on which the casing will adhere.
  • the plastic material formed of several components and ejected by said outlet orifice of the injection head does not pass through an intermediate means of the distribution channel or mixing cavity, located between said outlet orifice and said mold cavity.
  • the distance between the exit orifice of the injection head and the surface of the adjacent glazing on which the shaped casing is formed corresponds to the height of the casing profiled at this level on the finished product; no more matter is lost.
  • multi-component plastics material means that the plastic itself in order to crosslink requires the mixing and reaction of several monomers with one another; the chosen expression thus does not cover a plastic material which would need one or more polymerization agent (s) in a low or very low proportion (in a proportion of less than 10%), for example a catalyst and / or a accelerator.
  • the material used for the implementation of the invention may comprise, in addition to the multi-component plastics material, reinforcement elements such as example of glass fibers.
  • reinforcement elements such as example of glass fibers.
  • these reinforcing elements are added in a known manner to the polyols.
  • the material is preferably ejected by said outlet orifice at a wall of said molding cavity, i.e. the average plane of the outlet orifice is substantially coincidental in the average plane of the wall at this place.
  • the material is preferably ejected by said outlet orifice in a flow substantially perpendicular to the plane of the adjacent glazing.
  • the present invention also relates to a device for molding a profiled casing made of a plastic material formed of several components, in particular a polyurethane-based material, on at least one peripheral portion of a glazing unit, said device having at least one injection head having an outlet port through which the material is ejected and a molding cavity for forming said molded profile casing, characterized in that said outlet port of the injection head opens directly into said cavity molding.
  • this device does not include intermediate means of the distribution channel type or mixing cavity, located between said outlet port and said mold cavity.
  • the outlet orifice is preferably disposed flush in a wall of said mold cavity.
  • the outlet orifice according to the invention may also be arranged slightly protruding with respect to the wall of the molding cavity at this point (of the order of a few millimeters at the most, not more than 5 mm), but this will then result in a hollow mark on the final product; the outlet orifice according to the invention can also be arranged slightly recessed with respect to the wall of the molding cavity at this point (of the order of a few millimeters at the most, not more than 5 mm), but this will cause then a prominent mark on the final product.
  • the outlet port of the injection head is provided with a movable valve which is open during the injection of material to allow the material to flow into the mold cavity and is closed the rest of the time.
  • the injection head is disposed immobile next to the mold elements, at least one of which is movable to allow the loading and unloading of the glazing, respectively before and after the molding of the shaped casing because this injection head is complex because several components are mixed therein and recirculation of the components is provided between each material injection period; however, for the implementation of the present invention, the inventors have realized that it is quite possible to have the injection head in a wall of the mold and therefore, if the mold is movable, it It was possible to apply a movement to the injection head during each molding cycle.
  • the injection head of the device according to the invention is integral with a movable mold element.
  • the outlet orifice of the injection head has a substantially circular section having an axis disposed substantially perpendicular to the adjacent reception plane of the glazing.
  • this axis is perpendicular to this main surface of the glazing; if the injection is performed adjacent to the edge of the glazing, the axis of the orifice is then perpendicular to this edge.
  • the present invention also relates to glazing provided on at least one peripheral portion of a molded profiled casing made of a plastic material formed of several components, in particular a polyurethane-based material, the casing being manufactured by means of process of the invention.
  • the profiled casing of the glazing according to the invention does not have any marks or traces of deburring, but may include an injection mark at the point where the ejection of the material has been carried out.
  • This injection mark is preferably located in a section of the profiled hose that will be little or not visible once the glazing mounted.
  • the invention avoids the risks incurred in case of poor definition of the intermediate means or poor realization of this one. Indeed, if the intermediate means has not been well studied and finally does not give satisfaction, as it is made in the same room as a part of the molding cavity, if it is necessary to proceed with a recovery, it is necessary remove the mold part of the installation and start the machining, which is long and expensive and requires a complete immobilization of the molding device.
  • connection zone between the exit orifice of the injection head and the material forming the molded casing must no longer be the subject of a finishing step, because this area is smooth and straight. The cost of this finishing step is thus saved.
  • This connection zone is generally provided in a place that is not very visible in the end on the finished part because it remains generally detectable.
  • FIG. 1 illustrates a simplified bottom view of a molding device of the art prior, on a horizontally oriented glazing, the view being made at the lower surface of the glazing;
  • Figure 2 illustrates a sectional view along C-C of Figure 1;
  • Figure 3 illustrates the principle of recirculation of the two components of the plastic material for supplying the injection head
  • FIG. 4 illustrates a simplified top view of a molding device of the invention, on horizontally oriented glazing, the view being made at the lower surface of the glazing unit;
  • FIG. 5 illustrates a sectional view along D-D 'of FIG. 4.
  • Figures 1 and 2 illustrate a glazing (2) on which is formed in a known manner a casing (1) shaped plastic polymer formed of several components, here a polyurethane material.
  • the method of manufacturing the casing (1) is called "encapsulation” because it comprises a step of molding the casing (1) with the aid of a molding device (10) comprising a mold consisting of two hollow molding elements defining a molding cavity (5): an upper molding element (5 ') and a lower molding element (5 "), as can be seen in FIG. these molding elements are generally manufactured by machining a metal block.
  • a molding element here the lower molding element (5 ")
  • is fixed and the other is movable; however, it is also possible to provide that the two molding elements are movable.
  • the multicomponent plastic material is mixed inside an injection head (3) positioned generally at a joint plane of the two molding elements (5 ', 5 ") and is discharged towards the mold through an outlet (4).
  • the material ejected by the injection head (3) passes through a distribution channel (15) often cylindrical and often partly dug in the element upper molding (5 ') and partly in the lower molding element (5 ").
  • each molding element is closed on the glazing (2) by means of a seal system (7); however, for clarity, only the seal system (7) of the lower molding element (5 ") has been shown.
  • Each seal system constitutes an annular seal, positioned at the periphery of the glazing and has an axis X, oriented here vertically because the injection is performed on a glazing positioned horizontally; however, the X axis can also be oriented horizontally if the injection is operated on a vertically positioned glazing or otherwise oriented.
  • the seal system (7) may be molded, for example, of silicone.
  • the glazing unit (2) may be monolithic glazing, that is to say constituted of a single sheet of material or be multiple glazing, that is to say consisting of several sheets of material between which is inserted at less a layer of adherent material in the case of laminated glazing, or at least one intermediate space in the case of double glazing.
  • the sheets of material may be mineral, in particular glass, or organic, especially plastic.
  • the glazing (2) can thus be a glazing for a vehicle, in particular a fixed glazing such as a windshield, a side window, a quarter panel or a roof panel.
  • the glazing In the case of a vehicle glazing, the glazing generally has at least partially at its periphery an ornamental strip (8), as can be seen in Figure 2.
  • This strip ornamentation generally results from a enamel deposit, made on the inner face of the glazing or on an intermediate side of the glazing for the composite glazing, but it may also result from a partial and / or peripheral coloration of a sheet of material used, in particular a leaf made of organic material.
  • This ornamental strip (8) is made in the version shown under the glazing (2) on the face of the glazing intended to be oriented towards the inside of the vehicle.
  • the injection head (3) and the principle of the recirculation system of the material outside the injection phases are illustrated in detail in FIG.
  • the injection head (3) is provided at its distal end with a movable valve (9) which closes the outlet orifice (4) outside the material injection periods.
  • each of the components A and B is sucked from a reservoir, circulates inside the head and is returned in its respective tank. There is no contact between components A and B.
  • the mixture of the constituents of the injected plastic material is operated in the injection head and the complete homogenization is often obtained at the downstream end of the distribution channel (15). If the mixture produced is not perfect and the injected material presents unacceptable defects, it is necessary to launch an iterative process of optimization of the injection parameters to overcome these defects, or even to redo the mold part which integrates the injection channel. distribution (15). This obviously causes a significant loss of time and therefore money.
  • FIGS 4 and 5 illustrate a glazing unit (2) on which is produced according to the invention a casing (1) shaped plastic polymer formed of several components, here polyurethane.
  • the molding of the casing (1) is carried out by means of a molding device (11) comprising a mold consisting of two hollow molding elements defining a molding cavity (5): an upper molding element (5 ') and a lower molding element (5 "), as can be seen in FIG.
  • FIGS. 4 and 5 differs from that of the prior art illustrated in FIGS. 1 and 2 in that the material ejected by said outlet orifice (4) of the injection head (3) penetrates directly into said molding cavity (5) , without passing as before by an intermediate means of the distribution channel or mixing cavity, located between said outlet port (4) and said mold cavity (5).
  • the injection head used here is the same as before, but it is no longer positioned as before: it is now integrated in a molding element, here the lower molding element (5 ") which is here the fixed molding element, so that the material is ejected through the outlet (4) at a wall (6) of the molding cavity (5).
  • the movable valve (9) which closes the outlet port (4) outside the material injection periods is flush with the wall (6).
  • the mixture of the constituents of the injected plastic material is operated in the injection head. If the mixture produced is not perfect and the injected material has unacceptable defects, it is necessary to launch an iterative process for optimizing the injection parameters to overcome these defects.
  • a throttling portion that is to say a portion where the section of the component mixing duct is reduced.
  • the injection parameters are easily reproducible from one molding to another and when a new series of parts begins, with a different mold shape, if the previously performed injection was correct, even if the amount of injected material changes, it is sufficient to try a few to optimize the new injection and obtain the necessary quality, although there is no intermediate means for the homogenization of the mixture.
  • the outlet orifice (4) has a substantially circular section having a Z axis disposed substantially perpendicular to the adjacent reception plane of the glazing.
  • the glazing generally has at least partially at its periphery an ornamental strip (8).
  • the injection is carried out on one side of the hose which is not visible from the outside of the vehicle, once the glazing has been mounted so that the circular mark which may have occurred at level of the valve is not visible from the outside of the vehicle, once the glazing is mounted.
  • the injection is carried out on one side of the casing which is behind the ornamental band (8).
  • the injection could also be carried out in other places: in areas of the glazing that once mounted glazing will be hidden.
  • This (or these) insert (s) can (or can) be (or) reinforcement insert (s), generally completely integrated to the hose (1), or be (or) insert (s), generally ⁇ roéminent (s) relative to the casing, for fixing the glazing in the bay intended to accommodate it.
  • the glazing unit (2) as can be seen in FIG. 5 is provided with a casing (1) profiled in a polymeric material having a suitable surface condition, smooth, without asperities or bubbles and does not have any burrs but has an injection mark located where the injection was made.
  • This glazing is then delivered as it is to the customer after being out of the mold. No deburring operation is performed at the outlet of the mold before delivery to the customer.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Robotics (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Seal Device For Vehicle (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
EP05739456A 2005-03-03 2005-03-03 Procede de moulage d'un boyau profile sur un vitrage Ceased EP1853413A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2005/050144 WO2006092472A1 (fr) 2005-03-03 2005-03-03 Procede de moulage d'un boyau profile sur un vitrage

Publications (1)

Publication Number Publication Date
EP1853413A1 true EP1853413A1 (fr) 2007-11-14

Family

ID=35169967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05739456A Ceased EP1853413A1 (fr) 2005-03-03 2005-03-03 Procede de moulage d'un boyau profile sur un vitrage

Country Status (10)

Country Link
US (1) US20080241470A1 (ru)
EP (1) EP1853413A1 (ru)
JP (1) JP4603053B2 (ru)
KR (1) KR101191260B1 (ru)
CN (1) CN101171115B (ru)
BR (1) BRPI0520089B1 (ru)
CA (1) CA2599845C (ru)
EA (1) EA010846B1 (ru)
MX (1) MX2007010663A (ru)
WO (1) WO2006092472A1 (ru)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE541002T1 (de) 2007-05-01 2012-01-15 Exatec Llc Eingekapselte kunststofftafel und verfahren zu ihrer herstellung
CN102343643A (zh) * 2010-07-29 2012-02-08 绿点高新科技股份有限公司 塑胶结合玻璃的机壳及其制造方法
CN106945493B (zh) * 2017-03-14 2019-10-18 福耀玻璃工业集团股份有限公司 一种车窗玻璃的包边总成
KR102361174B1 (ko) * 2021-03-15 2022-02-15 주식회사 야야폴리텍 썬루프 글래스 및 썬루프 글래스의 제조방법

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DE10306523A1 (de) * 2003-02-14 2004-08-26 Hennecke Gmbh Verfahren zur Herstellung von Polyurethan-Formteilen
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Also Published As

Publication number Publication date
EA010846B1 (ru) 2008-12-30
CA2599845C (fr) 2013-02-05
KR101191260B1 (ko) 2012-10-16
JP2008531346A (ja) 2008-08-14
CN101171115A (zh) 2008-04-30
WO2006092472A1 (fr) 2006-09-08
US20080241470A1 (en) 2008-10-02
JP4603053B2 (ja) 2010-12-22
MX2007010663A (es) 2007-11-12
BRPI0520089A2 (pt) 2009-08-18
KR20070116593A (ko) 2007-12-10
BRPI0520089B1 (pt) 2016-10-18
CN101171115B (zh) 2011-07-13
CA2599845A1 (fr) 2006-09-08
EA200701876A1 (ru) 2008-02-28

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