WO2022161754A1 - GEGOSSENES BAUTEIL DAS GRÖßER IST ALS DIE GUSSFORM - Google Patents
GEGOSSENES BAUTEIL DAS GRÖßER IST ALS DIE GUSSFORM Download PDFInfo
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- WO2022161754A1 WO2022161754A1 PCT/EP2022/050225 EP2022050225W WO2022161754A1 WO 2022161754 A1 WO2022161754 A1 WO 2022161754A1 EP 2022050225 W EP2022050225 W EP 2022050225W WO 2022161754 A1 WO2022161754 A1 WO 2022161754A1
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- ZZUFUNZTPNRBID-UHFFFAOYSA-K bismuth;octanoate Chemical compound [Bi+3].CCCCCCCC([O-])=O.CCCCCCCC([O-])=O.CCCCCCCC([O-])=O ZZUFUNZTPNRBID-UHFFFAOYSA-K 0.000 description 1
- 150000001649 bromium compounds Chemical class 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
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- KWKXNDCHNDYVRT-UHFFFAOYSA-N dodecylbenzene Chemical class CCCCCCCCCCCCC1=CC=CC=C1 KWKXNDCHNDYVRT-UHFFFAOYSA-N 0.000 description 1
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- 239000006260 foam Substances 0.000 description 1
- WBJINCZRORDGAQ-UHFFFAOYSA-N formic acid ethyl ester Natural products CCOC=O WBJINCZRORDGAQ-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- UKACHOXRXFQJFN-UHFFFAOYSA-N heptafluoropropane Chemical compound FC(F)C(F)(F)C(F)(F)F UKACHOXRXFQJFN-UHFFFAOYSA-N 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 229910052892 hornblende Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012796 inorganic flame retardant Substances 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 150000004694 iodide salts Chemical class 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 235000013847 iso-butane Nutrition 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 150000004668 long chain fatty acids Chemical class 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- XLDBGFGREOMWSL-UHFFFAOYSA-N n,n'-bis[2,6-di(propan-2-yl)phenyl]methanediimine Chemical compound CC(C)C1=CC=CC(C(C)C)=C1N=C=NC1=C(C(C)C)C=CC=C1C(C)C XLDBGFGREOMWSL-UHFFFAOYSA-N 0.000 description 1
- ZWRDBWDXRLPESY-UHFFFAOYSA-N n-benzyl-n-ethylethanamine Chemical compound CCN(CC)CC1=CC=CC=C1 ZWRDBWDXRLPESY-UHFFFAOYSA-N 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- GLDOVTGHNKAZLK-UHFFFAOYSA-N octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid group Chemical group C(CCCCCCC\C=C/CCCCCCCC)(=O)O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 125000005375 organosiloxane group Chemical group 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
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- 239000002245 particle Substances 0.000 description 1
- 239000000312 peanut oil Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229910052615 phyllosilicate Inorganic materials 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920001610 polycaprolactone Polymers 0.000 description 1
- 239000004632 polycaprolactone Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- WQKGAJDYBZOFSR-UHFFFAOYSA-N potassium;propan-2-olate Chemical compound [K+].CC(C)[O-] WQKGAJDYBZOFSR-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
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- 229960003656 ricinoleic acid Drugs 0.000 description 1
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
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- HHJJPFYGIRKQOM-UHFFFAOYSA-N sodium;oxido-oxo-phenylphosphanium Chemical compound [Na+].[O-][P+](=O)C1=CC=CC=C1 HHJJPFYGIRKQOM-UHFFFAOYSA-N 0.000 description 1
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- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- DHNUXDYAOVSGII-UHFFFAOYSA-N tris(1,3-dichloropropyl) phosphate Chemical compound ClCCC(Cl)OP(=O)(OC(Cl)CCCl)OC(Cl)CCCl DHNUXDYAOVSGII-UHFFFAOYSA-N 0.000 description 1
- HQUQLFOMPYWACS-UHFFFAOYSA-N tris(2-chloroethyl) phosphate Chemical compound ClCCOP(=O)(OCCCl)OCCCl HQUQLFOMPYWACS-UHFFFAOYSA-N 0.000 description 1
- GTRSAMFYSUBAGN-UHFFFAOYSA-N tris(2-chloropropyl) phosphate Chemical compound CC(Cl)COP(=O)(OCC(C)Cl)OCC(C)Cl GTRSAMFYSUBAGN-UHFFFAOYSA-N 0.000 description 1
- 235000013799 ultramarine blue Nutrition 0.000 description 1
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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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/028—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles having an axis of symmetry
-
- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/26—Moulds or cores
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/56—After-treatment of articles, e.g. for altering the shape
- B29C44/5627—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0027—Cutting off
-
- 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
- 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
- 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
- B29K2105/041—Microporous
Definitions
- the present invention relates to components that are longer than the maximum spatial extent of the casting space of the mold and their manufacturing method.
- Casting molded parts is a very efficient manufacturing method for high-volume components because it can be carried out in a highly automated manner.
- the production of castings with a wide variety of requirement profiles is known, for example, from DE 10 2005 008 263 A1 or US Pat. No. 1,220,072.
- components are required that exceed the dimensions of the molds.
- the object of the present invention was therefore to design components from a cast body in such a way that the components are longer than the dimensions of the cast space.
- the subject of this invention is therefore a method for producing a casting according to claim 1, and castings produced in this way according to claim 13.
- FIG. 1 shows a casting from which the component shown in FIG. 2 can be produced.
- FIG. 1a shows the side view of the cast body with a semicircular bead in section, which remains as a web after the cast body has been cut to size along the dashed line and thus connects the two segments created by cutting the cast part to size.
- FIG. 1b shows the cast part with the protruding web in a plan view and FIG. 1c in a perspective view.
- Figure 2 shows the component produced from the casting shown in Figure 1 by cutting open along the dashed line there, consisting of two segments which are connected to one another via the web formed from the bead and are folded open along axis A in such a way that the Component reaches its maximum length L and is more than twice as long as the cast part shown in Figure 1 is wide.
- the subject of the invention in an embodiment 1 is a method for producing a component consisting of at least two segments, which are connected to one another via one or more webs, preferably movably, with a cast body being cast in a casting space of a mold in a first step and , a) the cast body comprises the webs and segments of the component or b) the cast body is machined after casting in such a way that it comprises the webs and segments of the component and in a second step the component is bent at the webs in such a way that it is bent along an axis A reaches its maximum length L and this maximum length L is longer than the maximum expansion M of the casting space.
- a component that is made up of individual segments but connected via webs using the method according to the invention has many advantages. It is often easier to handle for many areas of application. For example, compared to a component made of 2 separate segments, the assembly of a component with webs can be simpler, since the component can be glued together, for example, which sometimes saves several work steps, for example the application of adhesive.
- By connecting the segments via webs forces can be transferred between the segments. If a component is glued on, this can be used, among other things, to improve the adhesion of the edges of the segments in the area of the webs.
- the webs can also be used to relieve the adjacent surface.
- a defined distance between two segments can be set via the length of the webs, which does not change, in particular, even during a gluing process.
- the free space created by the webs can be used, among other things, for the passage of cables or lines.
- the design of the webs themselves as well as the segments can be diverse.
- ridges are round or ellipsoidal. In other preferred embodiments, the ridges are lamellar.
- the webs can connect the segments centrally at their abutting edges, but they can also be located closer to one side of the segments. This can be an advantage, for example, when the segments are glued to a surface. If the bars are located directly on the adhesive surface, they can also be glued on. This has the advantage that the segment composite can be glued to a surface more easily and better.
- the webs are shaped like lamellae and this lamella is designed in such a way that it can be glued onto the surface between the segments, this has advantages in preferred embodiments. Advantages are, for example, better adhesion of the segment composite, easier to process, better protection of the splice from penetrating dirt or moisture.
- the segments are configured by the method according to the invention as required by the component. Opposite surfaces can be shaped in the same way or differently. Preferred segments of components have at least one flat surface, which facilitates attachment to a flat base. Other Preferred Embodiments are adapted in their surface design to their place of installation. In preferred embodiments, the segments contain further design elements such as holes, for example for attachment, embossing, surface designs and the like.
- the process is designed in such a way that at least two segments are connected to one another in a component via the webs.
- the method can be designed in such a way that the component can also consist of more than 2 segments that are connected to one another via webs. Segments connected via webs are also referred to as segment composite.
- the casting space of the mold in the three spatial directions has a maximum height h, a maximum width b and a maximum depth t and for the maximum length L of the component one of the following conditions applies:
- a preferred embodiment 3 of the method which includes all the features of embodiment 2 or any of its preferred embodiments, and further wherein the depth t is less than or equal to the width b and the width b is less than or equal to the height h holds for the maximum length L of component:
- the casting space of the mold has a maximum height h, a maximum width b and a maximum depth t in the three spatial directions, and the maximum length L of the component is at least twice as long as either the depth t, the width b or the height h.
- the maximum length L of the component is at least twice the height h.
- the composite segments can also have multiples of the above-mentioned maximum length by producing more than 2 segments connected via webs from a cast part. All possible intermediate lengths of the segment assembly can also be produced by appropriate design of the individual segments. In preferred embodiments, the individual segments and webs are manufactured uniformly.
- the length of the composite segments can be easily adjusted, preferably by adjusting the length of the outer segments in the composite segment. This is usually the easiest. Particular installation conditions can make it necessary, in preferred embodiments, for different segments of a segment assembly to be shaped differently and/or to have different lengths.
- the cast body cast in the casting space already has segments and webs. These segments and webs preferably already correspond to those in the finished component. They can take on the concrete shape of the segments and webs in the finished component unprocessed or through further processing.
- This manufacturing process has the advantage that the component can be used without much additional effort. Of course, the usual treatments such as the removal of casting edges or casting channels cannot be avoided. In terms of cost-effective manufacture, machining that requires minimal additional work steps after casting is preferred. Nevertheless, it may be necessary to add individual design elements of the component that cannot be fitted in the mold or only with a disproportionate amount of effort to the cast part that has been removed. Drilling, embossing, punching or cutting, or combinations thereof, are mentioned here as examples and preferred.
- a preferred embodiment 8 of the method which contains all the features of a preceding embodiment 1 to 6 or one of its preferred embodiments, the individual segments or webs, or segments and webs, are obtained by cutting the cast body.
- This manufacturing method has the advantage that manufacturing costs for the molds can be saved and the filling process of the mold can be made faster than with delicate cast bodies.
- this embodiment requires at least one additional work step compared to embodiment 7, the preparation of the cast body.
- the preparation of the cast body is also referred to as cutting.
- Cutting means any type of preparation.
- Preferred cutting methods are cutting with a sharp object, also known as a cutting tool.
- Preferred cutting tools are knives, scissors, pliers, saws, electric arcs, lasers, water jets or compressed air.
- a preferred cutting tool is the water jet.
- the advantage of the water jet is that the cut edge is very clean and there is practically no overheating of the material.
- the use of the water jet opens up a wide variety of shapes.
- both embodiment 7 and embodiment 8 can be advantageous. In principle, almost any shape of the segments and webs can be produced in both embodiments, as explained above.
- the component is made from a rectangular casting.
- the rectangular cast body has the advantage that it is very easy to produce and, in the case of the preferred preparation forms of the component detailed below, there is very little waste of the material used.
- the rectangular cast body is prepared into preferably rectangular segments, preferably cut with a water jet, so that at least two segments remain connected via at least one web.
- the rectangular segment shape leads to little waste when preparing from the rectangular cast body.
- the cut for producing the rectangular segments is preferably carried out parallel to one of the surfaces of the cast body.
- the web protrudes from a surface of the otherwise rectangular casting.
- This protruding web is also referred to as a bead.
- the web could also be produced by preparing the preferably rectangular cast body. Webs that protrude from the otherwise rectangular base body, also referred to as bulges, are easy to produce, ie corresponding recesses can be easily incorporated in the mold and are characterized by high mechanical strength.
- the subsequent web is preferably placed as a bead over the edges of the segment sides that are to remain connected via the web.
- At least one ridge is ellipsoidal or semi-circular in a section perpendicular to the surface of the casting. This has the advantage that such a bead shape is easy to produce and particularly stable.
- the component can consist of any castable material; plastics are preferred.
- Preferred examples are acrylonitrile butadiene styrene (ABS), celluloid, rubber, polyamide (PA), polylactate (PLA), polybutylene terephthalate (PBT), polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene ( PE), polyetherketone (PEK) polyethylene terephthalate (PET), polypropylene (PP), polystyrene (PS), polyurethane (PU), polyvinyl chloride (PVC).
- Polyamide, polyurethane and polystyrene are preferred.
- Polyamide, polyurethane and polystyrene are preferred.
- Polyurethane is very particularly preferred.
- the materials can also be foamed.
- a particularly preferred foamed material is microcellular polyurethane.
- the production of the polyurethanes is known, in particular the production of the microcellular polyurethanes is described for example in WO 2009/037207, WO2016/033307 or also WO 2018/087387.
- microcellular means that the cells preferably have a diameter of 0.01 mm to 0.5 mm, particularly preferably of 0.01 mm to 0.15 mm.
- the microcellular polyurethanes particularly preferably have at least one of the following material properties: a density according to DIN EN ISO 1183-1 A between 200 and 1300 kg/m3, preferably between 270 and 1200 kg/m3, a tensile strength according to DIN 53504 (based on DIN EN ISO 527) of >20 N/mm2, preferably >40 N/mm2, particularly preferably between 20 and 80 N/ mm2 , an elongation at break according to DIN 53504 (based on DIN EN ISO 527) of >200%, preferably > 230%, particularly preferably between 300% and 700% and/or a tear propagation resistance according to DIN ISO 34-1 B (b) >6 N/mm, preferably >8 N/mm, particularly preferably >10 N/mm.
- the microcellular polyurethane has two, more preferably three of these material properties, particularly preferred embodiments have all four of the material properties mentioned.
- the elastomers based on microcellular polyurethane are usually produced in a form in which the reactive starting components are mixed and reacted with one another.
- the forms here are generally customary forms in question, for example Metal molds which, due to their shape, ensure the three-dimensional shape of the casting according to the invention.
- the polyurethanes can be produced by generally known processes, for example by using the following starting materials in a one- or two-stage process:
- the production of the microcellular polyurethanes is advantageously carried out at an NCO/OH ratio of 0.85 to 1.20, the heated starting components being mixed and introduced into the casting mold in an amount corresponding to the desired molding density.
- the castings are hardened after up to 60 minutes.
- the amount of reaction mixture introduced into the mold is preferably such that the moldings obtained have the density already described.
- the starting components are preferably introduced into the mold at a temperature of from 15° C. to 120° C., preferably from 30° C. to 110° C.
- the degree of compression for producing the cast parts is between 1.1 and 8, preferably between 2 and 6.
- the microcellular polyurethane is expediently produced according to the "one shot” process using low-pressure technology or, in particular, reaction injection molding technology (RIM) in open or preferably closed molds.
- RIM reaction injection molding technology
- the reaction is carried out in particular with compression in a closed mould.
- the reaction injection molding technique is described, for example, by H. Piechota and H. Rschreib in "Integral foams", Carl Hanser-Verlag, Kunststoff, Vienna 1975; DJ Prepelka and JL Wharton in Journal of Cellular Plastics, March/April 1975, pages 87-98 and II. Knipp in Journal of Cellular Plastics, March/April 1973, pages 76-84.
- Aromatic diisocyanates preferably 2,2'-, 2,4'- and/or 4,4'-diphenylmethane diisocyanate (MDI), 1,5-naphthylene diisocyanate (NDI), 2,4- and /or 2,6-tolylene diisocyanate (TDI), 2,4-tetramethylenexylene diisocyanate (TMXDI), 3,3'-dimethyldiphenyl diisocyanate, 1,2-diphenylethane diisocyanate, p-phenylene diisocyanate (PPDI), and/or ( cyclo)aliphatic isocyanate such as preferably 1,6-hexamethylene diisocyanate (HDI), 4,4'-, 2,4'- and 2,2'-dicyclohexylmethane diisocyanate (H12 MDI),
- HDI 1,6-hexamethylene diisocyanate
- H12 MDI 4,4'-, 2,4'- and 2,2
- the isocyanates can be used in the form of the pure compound, in mixtures and/or in modified form, for example in the form of uretdione, isocyanurates, allophanates or biurets, preferably in the form of reaction products containing urethane and isocyanate groups, so-called isocyanate prepolymers .
- MDI 2,2'-, 2,4'- and/or 4,4'-diphenylmethane diisocyanate
- NDI 1,5-naphthylene diisocyanate
- TDI 2,4-, 2,6-tolylene diisocyanate
- 3,3'-dimethyldiphenyl diisocyanate and/or mixtures of these isocyanates are used.
- the isocyanate-reactive compound (b) has a statistical average of at least 1.8 and at most 3.0 Zerewitinoff-active hydrogen atoms; this number is also referred to as the functionality of the isocyanate-reactive compound (b) and indicates the theoretical down-calculated from a quantity of substance to one molecule Amount of isocyanate-reactive groups on the molecule.
- the functionality is preferably between 1.8 and 2.6, more preferably between 1.9 and 2.2 and in particular 2.
- polyester diols preferably polycaprolactone
- polyether polyols preferably polyether diols, more preferably those based on ethylene oxide, propylene oxide and/or butylene oxide, preferably polypropylene glycol.
- a particularly preferred polyether is polytetrahydrofuran (PTHF).
- Polyesteroie from the following group: copolyesters based on adipic acid, succinic acid, pentanedioic acid, sebacic acid or mixtures thereof and mixtures of 1,2-ethanediol and 1,4-butanediol, copolyesters based on adipic acid, succinic acid, pentanedioic acid, sebacic acid or their Mixtures and mixtures of 1,4-butanediol and 1,6-hexanediol, polyesters based on adipic acid and 3-methyl-1,5-pentanediol and/or polytetramethylene glycol (polytetrahydrofuran, PTHF).
- PTHF polytetrahydrofuran
- PTHF polytetramethylene glycol
- Water acts as a blowing agent. It can be used alone or with other blowing agents. Water is preferably used as the sole blowing agent.
- catalysts (e) can be added to the reaction mixture both in the preparation of a prepolymer and, if appropriate, in the reaction of a prepolymer with a crosslinking component.
- the catalysts (e) can be added individually or as a mixture with one another.
- organometallic compounds such as tin(II) salts of organic carboxylic acids, e.g. B. tin (II) dioctoate, tin (II) dilaurate, dibutyltin diacetate and dibutyltin dilaurate or bismuth salts, preferably of carboxylic acids, bismuth is preferably present in the oxidation states 2 or 3, in particular 3.
- the carboxylic acids are preferably carboxylic acids with 6 to 14 carbon atoms, particularly preferably used with 8 to 12 carbon atoms.
- suitable bismuth salts are bismuth(III) neodecanoate, bismuth 2-ethylhexanoate and bismuth octanoate, and tertiary amines such as tetramethylethylenediamine, N-methylmorpholine, diethylbenzylamine, triethylamine, dimethylcyclohexylamine, diazabicyclooctane, N,N'- dimethylpiperazine, N-methyl,N'-(4-N-dimethylamino)butylpiperazine, N,N,N',N”,N”-pentamethyldiethylenediamine or the like.
- amidines such as 2,3-dimethyl-3,4,5,6-tetrahydropyrimidine, tris-(dialkylaminoalkyl)-s-hexahydrotriazines, especially tris-(N,N-dimethylaminopropyl).
- tetraalkylammonium hydroxides such as tetramethylammonium hydroxide
- alkali metal hydroxides such as sodium hydroxide
- alkali metal alkoxides such as sodium methylate and potassium isopropylate
- alkali metal salts of long-chain fatty acids having 10 to 20 carbon atoms and optionally pendent OH groups.
- the catalysts (e) are used in amounts of from 0.001 to 0.5% by weight, based on the prepolymer.
- blowing agents (f) customary in polyurethane production can be used.
- low-boiling liquids that evaporate under the influence of the exothermic polyaddition reaction are suitable.
- Liquids which are inert to the organic polyisocyanate and have boiling points below 100° C. are suitable.
- liquids that are preferably used are halogenated, preferably fluorinated, hydrocarbons, such as methylene chloride and dichloromonofluoromethane, partially or partially fluorinated hydrocarbons such as trifluoromethane, difluoromethane, difluoroethane, tetrafluoroethane and heptafluoropropane, hydrocarbons such as n- and iso-butane, n- and iso-pentane and technical mixtures of these hydrocarbons, propane, propylene, hexane, heptane, cyclobutane , Cyclopentane and cyclohexane, dialkyl ethers such as dimethyl ether, diethyl ether and furan, carboxylic acid esters such as methyl and ethyl formate, ketones such as acetone, and/or fluorinated and/or perfluorinated tertiary alkylamines
- the most expedient amount of low-boiling liquid for the production of such cellular, elastic moldings from elastomers containing bonded urea groups depends on the density which is to be achieved and on the amount of water which is preferably also used. In general, amounts of from 1% to 15%, preferably from 2% to 11%, by weight based on the weight of component (b) provide satisfactory results. Particular preference is given to using exclusively water (d) as blowing agent.
- Auxiliaries (g) can be used in the production of the moldings according to the invention. These include, for example, well-known surface-active substances, foam stabilizers, cell regulators, fillers, flame retardants, nucleating agents, antioxidants, stabilizers, antimicrobial agents, lubricants and mold release agents, dyes and pigments.
- Suitable surface-active substances are, for example, compounds which serve to support the homogenization of the starting materials and, if appropriate, are also suitable for regulating the cell structure. Mention may be made, for example, of emulsifiers, such as the sodium salts of castor oil sulfates or of fatty acids and salts of fatty acids with amines, for example oleic diethylamine, stearic diethanolamine, ricinoleic diethanolamine, salts of sulfonic acids, for example alkali metal or ammonium salts of dodecylbenzene or dinaphthylmethanedisulfonic acid and ricinoleic acid; Foam stabilizers, such as siloxane-oxalkylene mixed polymers and other organosiloxanes, ethoxylated alkylphenols, ethoxylated fatty alcohols, paraffin oils, castor oil or ricinoleic acid esters, Turkish red oil and peanut oil
- Oligomeric polyacrylates with polyoxyalkylene and fluoroalkane radicals as side groups are also suitable for improving the emulsifying effect, the cell structure and/or stabilizing it.
- the surface-active substances are usually used in amounts of 0.01 to 5 parts by weight, based on 100 parts by weight of the higher molecular weight polyhydroxyl compounds (b).
- Fillers, in particular fillers with a reinforcing effect, are to be understood as meaning the customary organic and inorganic fillers, reinforcing agents and weighting agents known per se.
- inorganic fillers such as silicate minerals, for example phyllosilicates such as antigorite, serpentine, hornblende, amphibole, chrisotile, talc; Metal oxides such as kaolin, aluminum oxide, aluminum silicate, titanium oxide and iron oxide, metal salts such as chalk, barite and inorganic pigments such as cadmium sulfide, zinc sulfide and glass particles.
- suitable organic fillers are: carbon black, melamine, expandable graphite, colophony, cyclopentadienyl resins and graft polymers.
- Fibers for example carbon fibers or glass fibers, are preferably used as reinforcing fillers, particularly when high heat resistance or very high rigidity is required, and the fibers can be equipped with adhesion promoters and/or sizes.
- the inorganic and organic fillers can be used individually or as mixtures and are usually added to the reaction mixture in amounts of from 0.5% to 50% by weight, preferably from 1% to 30% by weight, by weight of constituent components (a) to (c).
- Suitable flame retardants are tricresyl phosphate, tris(2-chloroethyl) phosphate, tris(2-chloropropyl) phosphate, tris(1,3-dichloropropyl) phosphate, tris(2,3-dibromopropyl) phosphate and tetrakis (2-chloroethyl) ethylene diphosphate.
- inorganic flame retardants such as red phosphorus, aluminum oxide hydrate, antimony trioxide, arsenic trioxide, ammonium polyphosphate and calcium sulfate or cyanuric acid derivatives such as e.g. melamine or mixtures of at least two flame retardants such as e.g. ammonium phosphates and melamine and optionally starch and/or expandable graphite can be used for flameproofing of the cellular PU elastomers produced according to the invention can be used.
- nucleating agents which can be used are talc, calcium fluoride, sodium phenylphosphinate, aluminum oxide and finely divided polytetrafluoroethylene in amounts of up to 5% by weight, based on the total weight of structural components (a) to (c).
- Suitable oxidation retardants and heat stabilizers which can be added to the cellular PU elastomers according to the invention are, for example, halides of metals from group I of the periodic table, eg sodium, potassium, lithium halides, optionally in combination with copper(I) halides ,
- halides of metals from group I of the periodic table eg sodium, potassium, lithium halides
- copper(I) halides e.g., halides of metals from group I of the periodic table, eg sodium, potassium, lithium halides, optionally in combination with copper(I) halides
- chlorides, bromides or iodides, sterically hindered phenols, hydroquinones and substituted compounds of these groups and mixtures thereof which are preferably used in concentrations of up to 1% by weight based on the weight of structural components (a) to (c). .
- hydrolysis stabilizers are various substituted carbodiimides, such as 2,2',6,6'-tetraisopropyldiphenylcarbodiimide or carbodiimides based on 1,3-bis(1-methyl-1-isocyanatoethyl)benzene, as they are, for example in the documents DE-A 19821668, DE-
- a 19821666, DE-A 10004328, DE-A 19954500, DE-A 19809634 or DE-A 4318979 which are generally used in amounts of up to 2.0% by weight, based on the weight of the structural components (a) to (c) are used.
- Lubricants and mold release agents which are usually also added in amounts of up to 1% by weight, based on the weight of structural components (a) to (c), are stearic acid, stearic alcohol, stearic acid esters and amides and the Fatty acid esters of pentaerythritol.
- organic dyes such as nigrosine, pigments such as titanium dioxide, cadmium sulfide, cadmium sulfide selenide, phthalocyanines, ultramarine blue or carbon black can be added.
- the component consists of microcellular polyurethane.
- a further object of this invention and embodiment 14 is a component manufactured by a method according to any one of the preceding embodiments 1 to 13 or one of their preferred embodiments.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Abstract
Description
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CN202280011595.3A CN116802037A (zh) | 2021-01-26 | 2022-01-07 | 大于铸造模具的铸造部件 |
KR1020237029097A KR20230133383A (ko) | 2021-01-26 | 2022-01-07 | 주조 금형보다 큰 주조 부품 |
EP22700026.2A EP4284618A1 (de) | 2021-01-26 | 2022-01-07 | GEGOSSENES BAUTEIL DAS GRÖßER IST ALS DIE GUSSFORM |
JP2023545239A JP2024505878A (ja) | 2021-01-26 | 2022-01-07 | 注型用型よりも大きい注型部品 |
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EP21153474.8 | 2021-01-26 | ||
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JP (1) | JP2024505878A (de) |
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GB1220072A (en) * | 1967-05-03 | 1971-01-20 | Baxenden Chemical Company Ltd | Improvements relating to foamed materials |
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-
2022
- 2022-01-07 WO PCT/EP2022/050225 patent/WO2022161754A1/de active Application Filing
- 2022-01-07 KR KR1020237029097A patent/KR20230133383A/ko unknown
- 2022-01-07 EP EP22700026.2A patent/EP4284618A1/de active Pending
- 2022-01-07 CN CN202280011595.3A patent/CN116802037A/zh active Pending
- 2022-01-07 JP JP2023545239A patent/JP2024505878A/ja active Pending
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KR20230133383A (ko) | 2023-09-19 |
CN116802037A (zh) | 2023-09-22 |
JP2024505878A (ja) | 2024-02-08 |
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