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WO1997047454A1 - Procede de fabrication d'un panneau en plastique moule - Google Patents

Procede de fabrication d'un panneau en plastique moule Download PDF

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Publication number
WO1997047454A1
WO1997047454A1 PCT/US1997/009816 US9709816W WO9747454A1 WO 1997047454 A1 WO1997047454 A1 WO 1997047454A1 US 9709816 W US9709816 W US 9709816W WO 9747454 A1 WO9747454 A1 WO 9747454A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
cover material
plastic
preform
plastic preform
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
PCT/US1997/009816
Other languages
English (en)
Inventor
Steven J. Dimig
Paul C. Waller
Patrick J. Martin
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.)
Lear Corp
Original Assignee
Lear Corp
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 Lear Corp filed Critical Lear Corp
Publication of WO1997047454A1 publication Critical patent/WO1997047454A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • B29C43/183—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles the preformed layer being a lining, e.g. shaped in the mould before compression moulding, or a preformed shell adapted to the shape of the mould
    • B29C43/184—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles the preformed layer being a lining, e.g. shaped in the mould before compression moulding, or a preformed shell adapted to the shape of the mould shaped by the compression of the material during moulding
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/20—Making multilayered or multicoloured articles
    • B29C43/203—Making multilayered 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
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • 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
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C2045/0079—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping applying a coating or covering

Definitions

  • This invention relates to molded plastic panels for automobiles, aircraft and similar interiors, wherein the panels have one face covered by a cover material.
  • Interior trim automobile components such as door panels generally include a molded plastic sub- strate .
  • the inner side of the molded substrate, facing the vehicle interior, has a cover material adhered to it and may also have cushions covered by the cover material to form an arm rest or other similar soft touch fea ⁇ tures.
  • cover material is a bi- or trilaminate including a foam backing, such as described in Savonuzzi European Patent Publication No. 639,442, published February 22, 1995, or Haartz U.S. Patent No. 5,456,976.
  • LPIM low pressure injection molding
  • LPIM open mold injection provides a substrate that is less likely to have problems with flow lines and permits more freedom for gate placement.
  • open mold injection process molten plastic is injected while the mold is open, causing the plastic to pool on the center of the mold core.
  • the cover material is then brought into face-to- face contact with the pooled plastic, and the mold is then closed with further injection of molten plastic in order to complete the process of molding the substrate and bonding it to the cover.
  • This process has proven useful but, like the closed mold process, is still limited to certain types of durable cover materials. It also can only be run in a vertical orientation.
  • KM Know Yourself Maffei
  • KM Know Yourself Maffei
  • a plastic preform is first injection molded in a first female mold over a portion of the core.
  • the male mold including the core is then shuttled to a second mold station in which a second female mold is positioned to compress the plastic preform against a sheet of cover material prepositioned on the female mold.
  • the second female mold has the shape of the desired panel and forces the preform to flow into its final shape while in contact with the cover material .
  • This process requires two female molds of different shapes which improve the condition of flow lines but increase the complexity of the tooling. In addition, it limits the range of projections to be integrally molded to the back of the substrate.
  • WoodstockTM process uses a moldable composite material made of polypropylene and a wood dust filler. See, e.g., U.S. Patent Nos. 4,328,067, 4,243,456, and 4,228,116. This material can be compression molded, and cutout portions have been molded by in-mold blades or projections that prevent the material from entering the cutout during molding.
  • the Woodstock process is conducted at a low pressure and is limited in its usefulness because the composite material does not have the flowability of pure plastic and cannot be injected in a manner effective to form long or thin projections or extensions as part of the molded panel.
  • the present invention is directed to a process which addresses these problems and provide further advantages.
  • One embodiment of the invention provides a method of applying a cover material to an injection molded substrate, comprising the following steps: a) applying a heat-activatable adhesive to the cover material; b) injecting molten plastic into a mold in an injection molding machine to form a hot plastic preform; c) opening the mold immediately after the mold is filled with molten plastic to expose the hot plastic preform; d) positioning the cover material over the preform between the two mold halves; and e) closing the mold to force the cover material into contact with the hot plastic preform such that the heat from the preform activates the heat-activatable adhesive for adhering the cover to the plastic preform.
  • the use of the heat-activatable adhesive eliminates the need for high pressures in forcing the cover material against the preform, thereby eliminating crushing or destruction of delicate cover materials. Also provided is a product manufactured in accordance with the above-referenced method steps.
  • a molded panel such as an automotive door panel is made by a process includ ⁇ ing an initial step of injecting a plastic into an injection molding machine including a core and a cavity which engage one another to form a closed mold. The mold is then opened before the plastic has completely solidified to expose a plastic preform. A sheet of cover material is positioned over the plastic preform, and then the cover material is forced into contact with the plastic preform under conditions effective to bond the cover material to the plastic preform. This process avoids exposing the cover material to high temperature and pressure injection molding conditions, and is thus suitable for virtually all types of cover materials. Flow line problems are minimized because the molding step is carried out before the cover material is pres ⁇ ent.
  • the plastic preform preferably has substantially the same shape as the finished panel, i.e., the second stage compression step requires minimal flowing of the plastic to fill a cavity.
  • the invention further provides a molded panel made according to the foregoing process, and a mold for use in an injection molding apparatus adapted for carry ⁇ ing out the process .
  • a mold for use in an injection molding apparatus adapted for carry ⁇ ing out the process .
  • such a mold includes a first mold section having a protruding core and a second mold section having a cavity, which mold sections engage one another to form a closed mold bounded by the cavity and the core.
  • the core has gates through which the plastic enters the mold.
  • a stepped, sliding stop is position- able between the mold sections to define two mold closure positions, including a first position defining a first, predetermined mold gap, and a second position defining a second, predetermined mold gap slightly greater than the first mold width. The second position provides for the thickness of the added cover material in the second stage molding step.
  • FIGURE 1 is a cross-sectional view of an injection mold according to the invention in an open position prior to molding
  • FIGURE 2 is a cross-sectional view of the mold of Figure 1 in a closed position with plastic being injected into the mold cavity during a first stage of the method of the invention
  • FIGURE 3 is a cross-sectional view of the mold of Figure 1 in an open position, following the initial molding step, with the cover material in position for engagement with the plastic preform;
  • FIGURE 4 is a cross-sectional view of the mold of Figure 1 in a closed position, with the cover materi ⁇ al in conformity with the plastic preform;
  • FIGURE 5 is a partial, enlarged view of the mold of Figure 1 at a corner recess
  • FIGURE 6 is an enlarged, cross-sectional view of the mold of Figure 4 at an edge of the mold, showing trimming of the cover material;
  • FIGURE 7 is a top plan view of the lower mold section of the mold of Figure 1;
  • FIGURE 8 is a cross-sectional view of a molded panel made according to the invention.
  • FIGURE 9 schematically illustrates method steps in accordance with another embodiment of the present invention.
  • an injection molding machine mold 10 includes a lower, male mold section 11 and an upper, female mold section 12.
  • Lower mold section 11 has an upright raised area or core 13 having a contour that corresponds to the desired shape of the inner wall of the finished substrate.
  • Upper mold section 12 has a downwardly opening cavity 14 that corresponds to the desired shape of the outer decorative surface of the finished molded panel.
  • Flow passages 16 in lower mold section 11 admit molten plastic through a number of gates 17 to the outer surface of core 13.
  • a plurality of stepped, sliding stops 18 are disposed for insertion between mold sections 11,12 as described hereafter.
  • stops 18 are manually or automatically inserted so that upper mold section 12 engages a narrow inner end 21 of each stop 18 and assumes a first, lowermost closed position relative to lower section 11.
  • Molten plastic 22, such as poly ⁇ propylene, is injected through passages 16 and gates 17 into a sealed mold cavity 23. Plastic 22 flows into and fills cavity 23.
  • Plastics usable in the invention include well-known thermoplastics used for molding rigid parts. Thermoset plastics could also be used.
  • This stage of the process is preferably conducted at a high pressure, since there is no danger of damaging the cover material, and in a minimum amount of time so that the mold can be opened before the plastic has set up.
  • Molding pressures can vary as needed but a pressure in the range of from about 500 to 15,000 psi is preferred for molding polypropylene. Molding temperatures are generally in the range from about 350 * to 500"F.
  • the high molding pressure permits protrusions such as studs, dog houses and backside features to be formed.
  • the mold cavity 23 remains closed for a time sufficient to permit the molded plastic to partially solidify and hold its shape when the mold is opened, but not long enough to allow the molten interior of the plastic to cool.
  • the cooling presence of the upper mold section 12 is re ⁇ moved, and heat from the interior of plastic 22 causes the exposed surface thereof to soften.
  • the total time that mold cavity 23 remains closed after injection of molten plastic 22 is preferably not more than about 5 seconds.
  • mold cavity 23 is opened by removing upper mold section 12 upwardly.
  • a sheet of a cover material 24 such as fabric, leather or vinyl is suspended on a movable tray 26 that can shuttle cover material 24 rapidly into position between mold sections 11,12.
  • cover material 24 is initially positioned slight- ly above the surface of the semi-solid plastic 22.
  • Tray 26 is raised so that outer edges of cover material 24 are pierced by pins 28 arranged about the periphery of cavity 23.
  • Tray 26 is then removed from material 24 and withdrawn, and cover material 24 remains suspended from pins 28. Stops 18 are moved further in so that wider ends 27 thereof are then positioned to act as spacers for upper mold section 12 relative to lower mold section 11.
  • a bank of heaters such as infrared heaters may optionally be mounted on the tray and moved over the surface of the plastic preform in order to wet the surface of the plastic.
  • upper mold section 12 is lowered into engagement with wider ends 27 so that it assumes a second closed position wherein mold sec ⁇ tions 11,12 are spaced slightly further apart than during the initial molding step. This distance is, for example, about 1.0 mm, the exact distance depending on the thickness of cover material 24.
  • This second stage molding step is generally conducted under low pressure with no additional plastic entering mold cavity 23. Molding pressures for this stage will generally range from about 30 to 100 psi, with temperature in the range from about 280 * to 350"F at the exposed surface. After a sufficient time, generally from about 25 to 40 sec ⁇ onds, the mold is opened and a molded panel 31 is removed. Flow lines are avoided because no substantial flow of molten plastic occurs during the step of bonding the cover material to the plastic substrate, but the bond between the substrate and the cover material is secure.
  • cover material 24 may be a bi- or trilaminate material including a foam layer, such as described in Savonuzzi European Patent Publication No. 639,442, published February 22, 1995, or Haartz U.S. Patent No. 5,456,976, the entire contents of which are incorporated by reference herein.
  • the foam layer will preferably have a density in the range of about 3 to 5 pounds per cubic foot for the bilaminate, or about 2 to 5 pounds per cubic foot for a trilaminate including a protective plastic backing for the intermediate foam layer.
  • a foam layer is provided as part of cover material 24, it is difficult to form a sharp edge or corner on the resulting exposed surface of the cover material. During molding, the cover material will tend to stretch out over the edge or corner, compressing the foam and forming a dull, gradual edge.
  • an enlarged corner cavity 32 may be provided in downwardly opening cavity 14 at a location where a sharp edge is desired on the outside of cover material 24.
  • Corner cavity 32 is generally triangular in cross-section and has a linear, uniform shape along its length.
  • Cover material 24 in the illustrated embodiment is a trilaminate including a vinyl outer layer 41, an intermediate foam layer 42 made of closed cell polypropylene, and an optional inner plastic layer 43 made of a polyethylene-polypropylene blend. Material 22 is forced into cavity 14 during the first stage molding. The resulting extra plastic at the corner compresses the cover material and permits the compressed foam in surrounding areas to rebound, so that a comparatively sharp edge 33 is formed.
  • Injection molding mold 10 may have several additional features that facilitate the molding process.
  • One or more shear blades 34 may be provided on one of the mold sections 11,12, preferably on the core 13, to provide a cutout area that remains sealed during mold ⁇ ing.
  • Blade 34 has a closed, endless shape corresponding to the shape of the desired cutout area, for example, rectangular with rounded corners, and is positioned as needed for a door handle, stereo speaker or similar insert .
  • An edge 36 of blade 34 enters into a recess 37 in the inner surface of cavity 14 during the first molding step to prevent plastic from entering the area of the cutout.
  • Recess 37 has a peripheral shape that matches that of blade 34 and is slightly larger, permit ⁇ ting edge 36 to fit closely inside.
  • Recess 37 has sufficient depth to permit blade 34 to fit inside during both molding stages, i.e., at both the narrower and wider mold section separations.
  • edge 36 is sufficiently sharp to cut out a piece of the cover material 24 at the location corres- ponding to the opening. This improvement eliminates the need to form cutout areas by molding a solid panel and then cutting away a desired portion of it in a separate operation.
  • Figure 6 illustrates an edge trim operation according to the invention.
  • an excess outer peripheral portion 46 of cover material 24 is trimmed by the overlapping, close fitting edges 47,48 of upper and lower mold sections 11,12, respectively.
  • upper mold section 11 has a straight shear edge 47 that achieves a bypass B slightly greater than the mold gap for best cutting effectiveness, e.g. B is about 3 mm for a 2.5 mm mold width.
  • This edge trim operation proved successful in the process of the invention, but unsuccessful when attempted using the known closed mold process.
  • Figure 8 illustrates the finished molded panel
  • the cover material 24 may be a single layer of vinyl, a bi- or trilaminate as described in the above-cited Haartz U.S. Patent No. 5,456,976 or other known covering materials or fabrics. Due to the lack of flow lines created by the open and closed mold processes, molded panel 31 made according to the process of the invention has improved physical characteristics in comparison to known molded panels.
  • a process according to the invention was carried out using a six hundred ton vertically acting clamping press and a plastic injection unit.
  • the mold consisted of a steel core and cavity surface with a heated manifold system and two valve gates for injection of the plastic into the mold.
  • the mold was preheated to 140'F and held at a constant temperature by circulating temperature controlled water through the mold.
  • a powered shuttle mechanism was provided to carry the covered material to the mold and position a bank of infrared heaters over the plastic resin.
  • the panel produced according to this example was made using a highly crystalline polypropylene with a 35 melt index as the substrate.
  • the cover material was a bilaminate of a vinyl material, 0.5 mm PVC, and a
  • Polypropylene resin was preheated in the injection unit and manifold system to 450 °F and held at that temperature.
  • the cover material was cut into a generally rectangular blank slightly larger than the finished part size. The blank was loaded by an operator onto a nesting tray fixed to the shuttle mechanism.
  • the mold was then closed under full press tonnage to the first mold stop, which left a 2.5 mm gap between the core and cavity surface of the mold.
  • the valve gates were opened, and the injection unit forced plastic into the mold until filled.
  • the plastic was injected at a speed of 24 in 3 /sec and at a maximum pressure of 10,000 psi. After injection was complete, the press was immediately opened so that hot plastic would remain on the core surface of the mold.
  • the press open cycle was set at its maximum rated speed to mini- mize the cooling time for the plastic. The entire injection cycle from the start of injection to opening of the mold lasted approximately 4 seconds.
  • the shuttle mechanism was then advanced to the mold to bring the blank into position between the core and cavity.
  • the nesting tray holding the cover material was lifted so that pins fixed to the cavity side of the mold pierced the cover material to hold it in position on the underside of the cavity.
  • the nesting tray was then lowered and removed.
  • a bank of quartz infrared heaters was advanced into position over the hot plastic on the core. The heaters were secured to the shuttle mechanism and carried by the same mechanism as the nesting tray. The heaters were turned on for 10 seconds to reheat the surface of the resin and rewet it for better adhesion. After heating was completed, the shuttle was retracted out of the press to clear the mold.
  • the press was then closed at its maximum safe speed and at full press tonnage using the second mold stop in order to leave a 3.8 mm gap between the core and cavity.
  • the cover material bonded to the hot plastic resin and compressed the plastic against the core surface. After a 40 second mold cooling time to permit the plastic to solidify, the press was opened and the part ejected.
  • Figure 9 schematically illustrates method steps in accordance with another embodiment of the present invention.
  • This embodiment addresses the problem inherent with crushing a cover material against a molded preform in that such a process may preclude thicker cover materials which could be damaged by the pressure applied for creating the bond with the plastic preform.
  • the goal is to apply a heat-activatable adhesive to the cover material and force the cover material into contact with the hot plastic preform such that the heat from the preform activates the heat-activatable adhesive, thereby forming an adhesive bond between the cover material and the plastic preform without requiring application of sub ⁇ stantial force or high temperatures to the cover materi- al which may damage a delicate cover material .
  • the adhesive used may be any heat-activatable thermoplastic- or thermoset-type adhesive or hot melt which is activated by heat, with or without requiring the presence of moisture.
  • the adhesive requires a much lower temperature for bonding than does the previously described preform injection molding process, thus enabling a wider range of cover materials to be used. It is also an improvement over post-mold gluing of the cover material because it avoids spray booths and the extra secondary operations .
  • This process uses the same process sequence and cooling as the preform injection molding described above with reference to other embodi ⁇ ments, but adds a heat-activatable adhesive between the cover material and the substrate.
  • the type of heat- activatable adhesive to be used must be compatible with the type of plastic used for the substrate.
  • the operation begins by pre-applying a layer of hot melt adhesive on the back side of the cover material (step 50 of Figure 9) .
  • This step can be done with the cover material still in a roll goods form to minimize the expense.
  • the preferred adhesive used is produced by Collano of Para ⁇ mount, California, and is classified as a hot melt adhesive. Its polymer type is listed as APAO/TPR. The trade name for the product is ECOMELT A2-EX89.
  • the application of the adhesive to the back of the cover material is preferably done with a Gravure roller. An adhesive coating thickness of .0035 inches is preferred. Of course, the type of adhesive, and thickness thereof, will vary depending upon the cover material, the plastic used, and the bonding strength required.
  • the molding process begins by closing the mold to an approximate 2.5 mm mold gap and then injecting 100% of the plastic resin (step 52) .
  • the mold is immediately opened with no mold cooling time to expose the hot plastic preform (step 54) .
  • the cover material is then shuttled into the mold over the preform between the two mold halves (step 56) .
  • the exposed surface of the plastic is preferably between 250 * and 350 * F, however, this temperature may be lower to prevent damaging delicate cover materials.
  • indexing mold stops increase the tool gap to between 3.5 mm and 4.5 mm to allow for the extra thickness of the cover material (step 58) .
  • the residual heat still remaining in the substrate activates the hot melt adhesive on the back of the cover material and bonds it to the plastic.
  • the mold is opened and the part is removed.
  • the hot melt adhesive layer could be activated at a temperature that is about 100 * F lower than what is required to cohesively bond cover material to a substrate when using a similar plastic material.
  • less pressure is re ⁇ quired to create the bond between the two materials. This allows a larger second cycle tool gap which reduces the crushing effect on the cover material.
  • Cover materials that are difficult to bond or are sensitive to crushing can now be used in a one-step molding process. There will be additional cost to pre-apply the adhesive to the cover material, but this will be offset by the ability to eliminate any post-heating of the substrate to improve the cohesive bondability.
  • This new process is also an improvement over the more traditional process of injection molding a substrate first and then going to a secondary operation to apply adhesive and vacuum forming the cover material to it.
  • the adhesive bonded preform injection process described herein is a true one-step molding operation and avoids the cost of any secondary operations. It also uses hot melt adhesive which is more environmental ⁇ ly friendly than solvent or water-based spray adhesives.
  • injection mold fill time would be approximately 4-5 seconds
  • opening the mold, shuttling in the cover material, and closing the mold would take approximately 14-20 seconds
  • the mold close time would be approximately 25-30 seconds
  • press motion times would add another 15-25 seconds to the cycle for a typical part.
  • these times may vary signifi- cantly depending upon the part size, the materials used, and the shuttling method. It will be understood that the foregoing description is of preferred exemplary embodiments of the invention, and that the invention is not limited to the specific forms shown.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

On fabrique un panneau moulé tel qu'une garniture de portière automobile selon un procédé consistant dans une première étape à injecter un plastique à l'intérieur du moule (10) d'une presse à injecter comportant un noyau (13) et une cavité (14) qui s'accouplent pour constituer un moule fermé, ledit noyau (13) comportant des entrées (17) à travers lesquelles le plastique pénètre dans le moule. On ouvre ensuite le moule avant que le plastique ne soit complètement refroidi de façon à révéler une préforme en plastique (22). On dispose une feuille d'un matériau de couverture (24) entre le noyau et la cavité, par dessus la préforme en plastique, puis on referme le moule afin de forcer le contact entre le matériau de couverture (24) et la préforme en plastique (22) dans des conditions permettant de lier efficacement le matériau de couverture et la préforme en plastique. Ce procédé permet d'éviter que le matériau de couverture ne soit exposé aux conditions de moulage par injection à température élevée et il est de ce fait adapté à l'utilisation de pratiquement tout type de matériau de couverture. Aucun problème associé une production en continu ne se pose du fait que l'étape de moulage est effectuée avant que le matériau de couverture ne soit placé dans le moule. Selon une autre version de ce procédé, on applique un adhésif thermocollant au matériau de couverture de façon à ce que la chaleur dégagée par la préforme en plastique chaud active cet adhésif, et lie ainsi le matériau de couverture à l'adhésif. Cette version du procédé ne requiert ni pression ni chaleur importante et rend possible l'utilisation de matériaux de couverture plus fragiles ainsi qu'une gamme relativement large de polymères.
PCT/US1997/009816 1996-06-10 1997-06-10 Procede de fabrication d'un panneau en plastique moule Ceased WO1997047454A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US63340296A 1996-06-10 1996-06-10
US633,402 1996-06-10
US76456796A 1996-12-09 1996-12-09
US764,567 1996-12-09

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WO1997047454A1 true WO1997047454A1 (fr) 1997-12-18

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10352513A1 (de) * 2003-11-05 2005-06-16 Faurecia Innenraum Systeme Gmbh Formteil, Verfahren zu dessen Herstellung sowie dessen Verwendung
CN103269841A (zh) * 2011-03-21 2013-08-28 萨玛派格德国有限公司 用于制造纤维增强的、包括配件的机动车用内部装饰构件的方法和装置
EP2119554A3 (fr) * 2008-05-14 2014-08-20 Essilor International (Compagnie Générale D'Optique) Revêtement d'une lentille injectée dans le mould d'injection
EP2119553A3 (fr) * 2008-05-14 2014-08-20 Essilor International (Compagnie Générale D'Optique) Procédé pour la revêtement d'un film à une lentille optique injectée
WO2017167430A1 (fr) * 2016-03-26 2017-10-05 Daimler Ag Procédé de fabrication d'un composant, en particulier pour un véhicule
CN110828214A (zh) * 2018-08-08 2020-02-21 昶玮科技股份有限公司 具有文字或图形的表面的双层塑料结构及其制造方法
DE102018128194A1 (de) * 2018-11-12 2020-05-14 Leonhard Kurz Stiftung & Co. Kg Verfahren zur Herstellung eines Bauteils sowie Spritzgießvorrichtung
US20220001662A1 (en) * 2018-11-12 2022-01-06 Leonhard Kurz Stiftung & Co. Kg Method for producing a component, and injection molding device
US12049029B2 (en) 2015-07-29 2024-07-30 International Automotive Components Group Gmbh Method and a device for producing a laminated moulded part

Citations (9)

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DE10352513A1 (de) * 2003-11-05 2005-06-16 Faurecia Innenraum Systeme Gmbh Formteil, Verfahren zu dessen Herstellung sowie dessen Verwendung
CN1878646B (zh) * 2003-11-05 2010-12-15 佛吉亚内饰系统有限公司 车辆内饰件的制造
EP2119554A3 (fr) * 2008-05-14 2014-08-20 Essilor International (Compagnie Générale D'Optique) Revêtement d'une lentille injectée dans le mould d'injection
EP2119553A3 (fr) * 2008-05-14 2014-08-20 Essilor International (Compagnie Générale D'Optique) Procédé pour la revêtement d'un film à une lentille optique injectée
CN103269841A (zh) * 2011-03-21 2013-08-28 萨玛派格德国有限公司 用于制造纤维增强的、包括配件的机动车用内部装饰构件的方法和装置
US12049029B2 (en) 2015-07-29 2024-07-30 International Automotive Components Group Gmbh Method and a device for producing a laminated moulded part
WO2017167430A1 (fr) * 2016-03-26 2017-10-05 Daimler Ag Procédé de fabrication d'un composant, en particulier pour un véhicule
CN110828214A (zh) * 2018-08-08 2020-02-21 昶玮科技股份有限公司 具有文字或图形的表面的双层塑料结构及其制造方法
DE102018128194A1 (de) * 2018-11-12 2020-05-14 Leonhard Kurz Stiftung & Co. Kg Verfahren zur Herstellung eines Bauteils sowie Spritzgießvorrichtung
US20220001662A1 (en) * 2018-11-12 2022-01-06 Leonhard Kurz Stiftung & Co. Kg Method for producing a component, and injection molding device
US12257823B2 (en) 2018-11-12 2025-03-25 Leonhard Kurz Stiftung & Co. Kg Method for producing a component

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