WO2004094130A1 - Kunststoffhohlkörper und verfahren zu deren herstellung - Google Patents
Kunststoffhohlkörper und verfahren zu deren herstellung Download PDFInfo
- Publication number
- WO2004094130A1 WO2004094130A1 PCT/EP2004/003173 EP2004003173W WO2004094130A1 WO 2004094130 A1 WO2004094130 A1 WO 2004094130A1 EP 2004003173 W EP2004003173 W EP 2004003173W WO 2004094130 A1 WO2004094130 A1 WO 2004094130A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- semi
- finished products
- films
- plastic
- foamed
- Prior art date
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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/266—Auxiliary operations after the thermoforming operation
- B29C51/267—Two sheets being thermoformed in separate mould parts and joined together while still in the mould
-
- 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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0053—Moulding articles characterised by the shape of the surface, e.g. ribs, high polish
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06905—Using combined techniques for making the preform
- B29C49/0691—Using combined techniques for making the preform using sheet like material, e.g. sheet blow-moulding from joined sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H1/00557—Details of ducts or cables
- B60H1/00564—Details of ducts or cables of air ducts
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
-
- 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
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/006—Using vacuum
-
- 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
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/007—Using fluid under pressure
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
- B29C33/424—Moulding surfaces provided with means for marking or patterning
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/22—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4823—Moulds with incorporated heating or cooling means
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/30—Moulds
- B29C51/36—Moulds specially adapted for vacuum forming, Manufacture thereof
- B29C51/365—Porous moulds
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/022—Particular heating or welding methods not otherwise provided for
- B29C65/028—Particular heating or welding methods not otherwise provided for making use of inherent heat, i.e. the heat for the joining comes from the moulding process of one of the parts to be joined
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/727—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
-
- 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
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
-
- 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
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
Definitions
- the invention relates to foamed plastic hollow bodies and a method for their production.
- thermoplastic, non-foamed polyolefin films It is known to heat thermoplastic, non-foamed polyolefin films and to deep-draw them under the application of vacuum on one mold half in order to achieve the desired shape. For example, packaging for food is produced in this way.
- semi-finished foam products for example from polystyrene foam
- shaping of semi-finished foam products for example from polystyrene foam
- semi-finished products are networked! Polyethylene S' ⁇ ha ⁇ jmst ⁇ ff products such as ermsoüermatten manufactured by heating and subsequent pressing in a contour-giving shape.
- blow molding a preform or a tube extrudate is inflated within a cavity by means of a blowing lance (see, for example, DE-A-35 12 973 and EP-B1-0 545 055).
- rotational molding thermoplastic powder or granules are introduced into a heatable tool and by rotating the tool, powders or granules are evenly distributed and melted on the outer skin.
- solid hollow bodies such as barrels or canisters as well as three-dimensionally shaped decorative layers, preferably based on polyvinyl chloride (PVC), are produced, for example for instrument panels.
- DE-A-100 10 900 describes a combined extrusion-pressing process in which half-shells are produced from preforms, which are then welded into hollow bodies. However, the method is only suitable for components with solid walls.
- Hollow body described in which two semi-finished foam products are connected to each other, a fluid is introduced between the semi-finished products and hollow bodies are formed in a tool.
- Disadvantages of this method are the thinning in the higher stretched areas, the poor surface quality inside and on the surface facing the tool, residual amounts of the fluid, the need for temperature control of the fluid and a limited deformability of the foam films.
- thermoforming / deep drawing Processes such as thermoforming / deep drawing are primarily suitable for
- thermoforming for example, by printing the ventilation holes.
- the side that does not abut the mold half also shows a rough surface structure due to the melting of the polymer.
- the currently used cross-linked or partially cross-linked polyolefin foam films can only be thermoformed to a limited extent, since they are cross-linked
- the invention is therefore based on the object of providing a method for producing foamed plastic hollow bodies which, by means of a simpler process control and by means of simple and inexpensive system technology, enables economical production of low-density foamed plastic hollow bodies, without being restricted to certain geometries of the hollow bodies by means of limited deep-drawing rates , with which the production of foamed plastic hollow bodies with a smooth, visually appealing surface is possible, which can be completely reused (recycled).
- single or multi-layer uncrosslinked polypropylene foam films are preferably used as plastic semi-finished products made of foamed, thermoplastic, which particularly preferably also in combination with non-foamed plastic films, fabrics, Knitted fabrics, nonwovens, glass fibers, decorative and cover layers can be used.
- the uncrosslinked polypropylene foam films with laminated or coextruded unfoamed films are preferably used.
- Polypropylene foam film is at least partially bonded to laminated decorative layers, in particular decorative films or textile layers. Inserts or decorative elements, such as labeled foils, are particularly preferably formed during the process, in particular if it is designed as a thermoforming process.
- the tools are designed in such a way that the tool halves, the shape of which corresponds to the outer contour of the hollow body to be produced, consist of a porous material or are perforated. Porous or perforated resins, porous or perforated metals, metal grids, sintered metals or combinations thereof can be used here.
- the semi-finished products to be reshaped are e.g. over the pores or perforations in the tool halves.
- Foam foils initially held in one half of the mold by means of negative pressure, which ensures that the foil is fixed and the wrinkle-free adaptation to the tool contours is ensured.
- the adaptation to the tool contour can be done by regulating the negative pressure, which causes the foam sheet to deform.
- the semi-finished products can be held over clamping devices, which preferably allow the material to be tracked during the deep-drawing process and / or ensure the seal between the semi-finished product and the mold half.
- a counter-holder or a tool core can additionally be used, which is pressed into the perforated or porous mold half over the film for forming.
- the semi-finished products to be formed can be formed before and during the forming process Forming process are heated, for example by infrared radiation.
- the semi-finished products to be formed are preferably heated to a temperature of 150 to 250 ° C.
- the mold halves can be tempered.
- the semi-finished plastic products are at least partially integrally welded to one another at the parting plane of the tool halves. This is done by merging the mold halves and tempering the semi-finished products at the points to be welded.
- An essential feature of the method according to the invention is the use of thermal energy for the simultaneous thermoforming and welding of the semi-finished products at their contact points. The closing of the mold halves or the merging of the later connection points is controlled in time with the start of the thermoforming in such a way that an ideal thermoforming or stretching of the semi-finished products is made possible, possibly with tracking of the foam films used as semi-finished products, and the connection points nevertheless have a sufficient temperature have for welding.
- the heating of the deep-drawn semi-finished products to be formed which is necessary for the forming, can be achieved via heating devices such as infrared radiators outside and / or inside the tool and / or by tempering the tool cavity. Furthermore, the imaging accuracy of the tool surface in the foam film can be controlled via the mold temperature control and skin formation or compaction can be generated on the film surface.
- the tool halves are preferably closed simultaneously with or immediately after a negative pressure is applied.
- the vacuum is at least partially maintained in the tool halves during welding. Furthermore, this can also be done by regulating the pressure in the tool Refill material to prevent cracks and changes in wall thickness in areas that need to be shaped.
- a lance is introduced into the cavity of the hollow body in order to either build up an overpressure in the interior in order to increase the shape and surface quality, or to produce a vacuum which increases the density of the foam sheet by increasing the wall thickness decreased and the bending stiffness increased.
- the wall thickness and thus the bending stiffness decrease in a normal thermoforming or deep-drawing process.
- the foamed structure enables by applying negative pressure on both sides of the heated foam sheet, i.e. in the cavity and on the tool, increasing or at least reducing the wall thickness to its original thickness.
- the surfaces of at least one of the two tool halves are preferably at least partially structured, the structure preferably being in the form of a grain, for example a leather grain, or a textile structure or lattice structure and by molding the tools from a negative model with a corresponding surface structure or by direct insertion the structure in the tool surface using common methods, e.g. cutting processes, etching processes, spark erosion processes, laser processes.
- common methods e.g. cutting processes, etching processes, spark erosion processes, laser processes.
- a major advantage of the method according to the invention is the cost-effective production of hollow bodies and shaped bodies which at least partially contain cavities.
- a method is provided which also enables the production of hollow bodies with foamed walls of low density. By controlling the negative pressure on the tool wall in combination with the temperature control of the foam films and / or the tools, a reproducible wall thickness of the hollow foam body with a high-quality surface is obtained.
- extremely light and heat-insulating air guiding elements and other parts for motor vehicle interiors can advantageously be produced.
- Double-walled, heat-insulating, lightweight containers for the food industry with a high-quality, hygienically perfect surface can also be produced.
- FIG. 1 is a schematic representation of a heating device for foam films
- FIG. 2 to Figure 6 show schematically different stages of a preferred embodiment of the method according to the invention for producing a foamed plastic hollow body from non-crosslinked polypropylene foam films, using porous tool halves.
- two polypropylene foam films (1, 2) are heated to a temperature between 150 ° C. and 210 ° C. in an infrared heating device (10, 20).
- the heated foam sheets (1, 2) are transferred to a porous forming tool (FIG. 2) with the two mold halves (5, 6) made of commercially available pore resin of the Metapor ® brand and by applying a vacuum (symbolized by the arrows 3, 4 ) on the porous
- the foam foils (1, 2) are completely reshaped and adapted to the inner contour of the tool halves (5, 6).
- Vacuum on the tool halves (5, 6) is at least partially maintained in order to avoid warping of the foils.
- the tool halves (5, 6) are opened after the negative pressure has been released (FIG. 6), after which the molded part (30), a hollow body made of foamed polypropylene, is made from the foam foils (1, 2).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10313495A DE10313495A1 (de) | 2003-03-25 | 2003-03-25 | Kunststoff-Hohlkörper und Verfahren zu dessen Herstellung |
DE10313495.6 | 2003-03-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004094130A1 true WO2004094130A1 (de) | 2004-11-04 |
Family
ID=32980711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/003173 WO2004094130A1 (de) | 2003-03-25 | 2004-03-25 | Kunststoffhohlkörper und verfahren zu deren herstellung |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE10313495A1 (de) |
WO (1) | WO2004094130A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201800006716A1 (it) * | 2018-06-27 | 2019-12-27 | Componente di stampo a iniezione |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10195782B2 (en) * | 2013-12-06 | 2019-02-05 | Unique Fabricating Inc | Air filled gasket |
JP2020029025A (ja) * | 2018-08-22 | 2020-02-27 | Nok株式会社 | ループ体の成形装置および成形方法 |
DE102020134732A1 (de) | 2020-12-22 | 2022-06-23 | Liebherr-Hausgeräte Ochsenhausen GmbH | Thermoformteil |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19807411A1 (de) * | 1998-02-21 | 1999-08-26 | Volkswagen Ag | Luftströmungskanal für eine Lüftungseinrichtung eines Kraftfahrzeugs |
WO2002062571A2 (de) * | 2001-02-06 | 2002-08-15 | Fagerdala Deutschland Gmbh | Verbundmaterial aus einer polypropylen-deckschicht sowie einer polypropylen-schaumfolie |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3256565A (en) * | 1962-12-31 | 1966-06-21 | Formex Mfg Inc | Vacuum forming apparatus |
BE756475Q (fr) * | 1964-10-14 | 1971-03-01 | Dunlop Co Ltd | Balles de tennis de table |
DE3045417A1 (de) * | 1980-12-02 | 1982-08-19 | Goodyear Aerospace Corp., 44316 Akron, Ohio | Verbundmaterial zur herstellung von behaeltern mit biegsamen wandungen und verfahren zur herstellung der behaelter |
DE3244994A1 (de) * | 1982-12-04 | 1984-06-07 | Hans Samel Maschinenbau, 6710 Frankenthal | Verfahren und vorrichtung zur herstellung von hohlkoerpern aus zwei platten thermoplastischen kunststoffes |
IT1251639B (it) * | 1991-10-28 | 1995-05-17 | Sviluppo Settori Impiego Srl | Procedimento per la produzione di manufatti a partire da lastre termoplastiche rinforzate |
US6056842A (en) * | 1997-10-03 | 2000-05-02 | Acushnet Company | Method of making a golf ball with a multi-layer core |
US6372176B1 (en) * | 1999-03-01 | 2002-04-16 | Kiefel Technologies Inc. | System and method for twin sheet forming |
-
2003
- 2003-03-25 DE DE10313495A patent/DE10313495A1/de not_active Withdrawn
-
2004
- 2004-03-25 WO PCT/EP2004/003173 patent/WO2004094130A1/de active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19807411A1 (de) * | 1998-02-21 | 1999-08-26 | Volkswagen Ag | Luftströmungskanal für eine Lüftungseinrichtung eines Kraftfahrzeugs |
WO2002062571A2 (de) * | 2001-02-06 | 2002-08-15 | Fagerdala Deutschland Gmbh | Verbundmaterial aus einer polypropylen-deckschicht sowie einer polypropylen-schaumfolie |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201800006716A1 (it) * | 2018-06-27 | 2019-12-27 | Componente di stampo a iniezione | |
WO2020003090A1 (en) * | 2018-06-27 | 2020-01-02 | S.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A. | A component of a mold for molding preforms, a mold for molding preforms and a process for obtaining the component |
Also Published As
Publication number | Publication date |
---|---|
DE10313495A1 (de) | 2004-10-14 |
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