18 results about "Reaction injection molding" patented technology

The present invention relates to the use of polyisocyanate compositions and trimerization catalysts for production of coatings by reaction injection molding. The present disclosure also describes the coatings obtained by the use. The correspondingly coated workpieces are also described in this disclosure. A method for coating workpieces by reaction injection molding is also described herein.

The invention provides a PUR-based integrally-formed ultrathin light-emitting character mark which comprises an integrated ultrathin character mark body composed of a PUR thin film shell layer, a PVD membrane layer, a shading layer and a PUR substrate which are sequentially arranged from outside to inside, and a patch type Mini LED flexible light bar module arranged on the inner side face of the PUR thin film shell layer. The PUR thin film shell layer is a PUR thin film formed through reaction injection molding, the PVD diaphragm layer is a light guide layer, microprism-shaped or scattering lattice points are processed on the inner surface of the PVD diaphragm layer through silk-screen printing, the shading layer is a light-proof layer arranged on the PVD diaphragm layer through co-injection molding or film covering, and the light-proof layer is a light-proof layer arranged on the PVD diaphragm layer through silk-screen printing. And the patch type Mini LED flexible light bar module is embedded and packaged on the side surface of the PUR film shell layer to form a side-in type light path. The car logo has the advantages that the car logo structure is light, thin and seamless, and the car logo has the integrally-formed high-light-transmittance crystal texture.

The present invention relates to a method for manufacturing an exterior trim part (20) for vehicles using a reaction injection molding process in a reaction injection mold (1), comprising the following steps: providing a carrier substrate (2) made of a first plastic material, which is at least partially planar, wherein the carrier substrate (2) has an opening (3) through the carrier substrate (2) and a first side (a) and a rear side (b) opposite the first side (a); positioning the carrier substrate (2) within a cavity of the reaction injection mold (1) formed by two mold halves (A, B), wherein, in the closed state of the reaction injection mold (1), an additional cavity (4) remains free within the cavity between the first side (a) of the carrier substrate (2) and one of the mold halves (A) of the reaction injection mold (1);Introducing a further plastic material into the additional cavity (4), wherein the further plastic material, after its solidification or hardening, forms a cover layer (5) on or over the first side (a) of the support substrate (2). When introducing the further plastic material into the additional cavity (4), in addition to forming the cover layer (5), the flank (10) is also sealed with the further plastic material, whereby an unintended overspray of the back (b) of the support substrate (2) is prevented by means of a sealing edge (7, 8) or by means of several sealing edges (7, 8).

The application discloses a spray-free body panel and a manufacturing method and device thereof, which comprises a substrate made of injection-molded thermoplastic polymer, used for providing structural strength and rigidity; an intermediate structure arranged on the substrate, made of reactive resin by reactive injection molding and containing coloring materials, used for providing color effects; and an outer layer structure arranged on the outside of the intermediate structure, formed by heating and vacuum adsorption of a prefabricated sheet material. The application adopts a two-step process of double-station parallel pretreatment and one-time mold closing, and has simple procedures, short production cycle and high qualified rate.

The invention provides a PUR-RIM injection molding packaging method for an ultrathin light-emitting identifier. The PUR-RIM injection molding packaging method comprises the following steps: step 1, presetting CAS curved surface data and a target thickness of 3-4mm according to the light-emitting identifier; step 2, packaging a PVD decorative semi-permeable electroplating membrane on the surface of the light source module by using vacuum coating equipment; 3, a CNC machining center is adopted for conducting shape machining and clearance treatment on the PC plate; 4, the light source module component formed in the step 2 and the PC membrane are precisely aligned and pasted through UV curing glue; 5, the assembly module completed in the step 4 is placed in a precise injection mold, and a polyurethane material is injected through PUR-RIM reaction injection molding equipment; 6, a five-axis CNC machining center is adopted for removing the hollowed-out part and redundant material handles of the integrally-formed part; the ultra-thin mini LED lamp panel has the advantages that integrated packaging of the ultra-thin mini LED lamp panel is achieved in a polyurethane reaction injection molding mode.

Embodiments relate to a coating, adhesive, sealant, elastomer, or reaction injection molded material forming polyurethane composition that comprises an isocyanate component that includes at least one isocyanate-terminated prepolymer, and an isocyanate reactive component that includes at least one Lewis acid catalyst polymerized polyether polyol having a weight average molecular weight from 200 g / mol to 1,000 g / mol, an average primary hydroxyl group content of at least 30%, and an average acetal content of at least 0.05 wt %.

The invention relates to the technical field of semiconductor polishing, in particular to a polyurethane micropore polishing pad capable of automatically adjusting the grinding rate and a manufacturing process of the polyurethane micropore polishing pad. The invention aims to solve the problem of low polishing efficiency caused by poor self-adjusting performance of a polyurethane microporous polishing pad in the prior art. The preparation method comprises the following steps: preparing modified microspheres containing nano boron nitride and an active water layer, and matching the modified microspheres with hydrophilic polyurethane micro powder to prepare functional slurry; synthesizing a thermosensitive prepolymer containing a polycaprolactone crystal segment; and performing in-situ initiation of microcellular foaming on the surface of the microsphere by utilizing a reaction injection molding and centrifugal casting process. The problems that a traditional polishing pad is prone to glazing and high in dependency on a trimmer are solved by means of crystallization phase change of PCL and interface stripping of hydrophilic micro powder; and meanwhile, the microporous structure keeps high hardness, realizes long-term stability of high rebound rate and polishing rate, and is suitable for planarization polishing of 12-inch wafers.

The present invention relates to a method for manufacturing an exterior trim part (20) for vehicles using a reaction injection molding process in a reaction injection mold (1), comprising the following steps: providing a carrier substrate (2) made of a first plastic material, which is at least partially planar, wherein the carrier substrate (2) has an opening (3) through the carrier substrate (2) and a first side (a) and a rear side (b) opposite the first side (a); positioning the carrier substrate (2) within a cavity of the reaction injection mold (1) formed by two mold halves (A, B), wherein, in the closed state of the reaction injection mold (1), an additional cavity (4) remains free within the cavity between the first side (a) of the carrier substrate (2) and one of the mold halves (A) of the reaction injection mold (1);Introducing a further plastic material into the additional cavity (4), wherein the further plastic material, after its solidification or hardening, forms a cover layer (5) on or over the first side (a) of the support substrate (2). When introducing the further plastic material into the additional cavity (4), in addition to forming the cover layer (5), the flank (10) is also sealed with the further plastic material, whereby an unintended overspray of the back (b) of the support substrate (2) is prevented by means of a sealing edge (7, 8) or by means of several sealing edges (7, 8).

The invention relates to a manufacturing method of a light-weight composite material protective door, which comprises the following steps of: designing and checking the strength of a main body bearing structure and size of a protective door product by adopting a finite element analysis method according to the test requirements of a resistance performance test of the protective door; the main body bearing component and the non-bearing component are manufactured through a reaction injection molding technology, a vacuum resin transfer molding technology, a vacuum auxiliary molding technology and a compression molding technology; and the main body bearing component and the non-bearing component are bonded through structural adhesive, bolts are used for being connected with the pre-buried connecting metal inserts in all the components of the protective door, fastening and connecting of all the components of the protective door are achieved, and rapid assembly of the lightweight composite material protective door is completed. By means of the method, the product weight can be greatly reduced, the manufactured protective door can achieve the purpose of light weight of the protective door product of civil air defense engineering, and the cost of product transportation, installation and maintenance can be directly reduced.

Mounting frame for use in motor vehicle construction for defining a recess of a sunroof and for fastening and / or clamping a material of a headliner around the recess and / or a covering towards the recess, characterized in that the mounting frame is manufactured in one piece from rigid polymeric material, namely dicyclopentadiene (DCPD) or poly-dicyclopentadiene (PDCPD), using the Reaction Injection Moulding (RIM) process.

This invention discloses an environmentally friendly bio-based polyurethane reaction injection molding composition and its preparation method. The environmentally friendly bio-based polyurethane reaction injection molding composition comprises, by mass fraction: Component A: 60-90% modified polyol, 3-10% autocatalytic chain extender, 4-15% alcohol chain extender and / or alkanolamine chain extender, 1-8% carbon black, 1-5% anti-aging agent, and 0.05-2% composite catalyst; Component B: 60-90% diphenylmethane diisocyanate or 4,4'-dicyclohexylmethane diisocyanate, 10-40% jojoba oil polyol; isocyanate (NCO) content 16%-30%; the modified polyol includes 500-1000 parts by weight of polyether polyol, 40-70 parts by weight of jojoba oil polyol, and 25 parts by weight of isocyanate. The prepared composition can shorten the demolding time by 10-25% while keeping the gel time constant, which can meet the requirements of rapid injection and demolding. At the same time, it shortens the production cycle and improves production efficiency. Its performance is comparable to that of existing technologies, and it enables renewable bio-based polyols to partially replace petrochemical-derived polyols.

Injection molded, blow molded, and rotational molded articles that integrally incorporate an operable photovoltaic device, and method and system for producing such articles. A method includes: placing an operable photovoltaic device at an inner-side of a mold cavity of a mold; performing injection molding or reaction injection molding or blow molding or rotational molding, of raw plastic materials or raw polymeric materials; and forming a single or singular, monolithic, unified or uniform, molded article that integrally incorporates and fixedly holds and tightly secures, therein or thereon, the operable photovoltaic device, directly and securely and tightly via the solidified molded plastic or the solidified molded polymer that are adjacent to it.

This invention belongs to the field of polydicyclopentadiene products, specifically relating to a molding method for a high-filler polydicyclopentadiene composite material. The molding method includes the following steps: mixing and extruding a combination liquid A and a combination liquid B in a twin-screw extruder; the resulting liquid extrudate enters a mold cavity for polymerization molding; during the mixing and extrusion process, dicyclopentadiene polymerization does not occur in the combination liquid A and combination liquid B. This invention utilizes the characteristics of high-filler dicyclopentadiene, achieving shear mixing of the combination liquid A and combination liquid B through the forced mixing and compression action of the twin-screw extruder, achieving a material mixing effect essentially consistent with reaction injection molding. This allows for the production of high-filler polydicyclopentadiene composite material products without using reaction injection molding equipment, making the industrial production of polydicyclopentadiene composite material products with higher hardness and heat distortion properties possible.

The invention discloses a spraying-free vehicle body panel and a manufacturing method and device thereof, and the spraying-free vehicle body panel comprises a substrate which is composed of an injection-molded thermoplastic polymer and is used for providing structural strength and rigidity; the middle structure is arranged on the substrate, is made of reactive resin formed by reaction injection molding, comprises a coloring material and is used for providing a color effect; and the outer layer structure is arranged on the outer side of the middle structure and is formed by heating and vacuum adsorption of a prefabricated sheet material. The two-step process of double-station parallel pretreatment and one-time mold closing is adopted, the working procedure is simple, the production period is short, and the percent of pass is high.

The invention provides a light-emitting identification manufacturing method of an integrated light-emitting identification based on PUR packaging, which comprises the following steps: S1, manufacturing a PUR shell, and manufacturing a shell body with crystal texture by using a reactive polyurethane PUR material through a reaction injection molding process; s2, a light source module is embedded, and the LED light source module prepared in advance is placed in the containing cavity of the PUR shell; s3, packaging treatment is conducted, liquid PUR glue or epoxy resin glue is injected into the PUR shell, reaction curing is conducted under the condition of the normal temperature or the preset heating temperature, the light source module is packaged in the PUR shell, and a packaging layer is formed; and S4, double-faced adhesive tape is pasted on the back face of the packaging layer, and the vehicle logo assembly is completed. The car logo has the advantages that the car logo structure is light, thin and seamless, and the car logo has the integrally-formed high-light-transmittance crystal texture.

Painted and translucent component (1), in particular vehicle trim part, comprising: a. A base body (2) made of a transparent or translucent plastic. b. A paint coating (3) on the base body (2), wherein the paint coating (3) comprises at least one structured paint coating layer (3b). c. A top layer (5) made of a transparent plastic applied to the paint coating (3) by reaction injection molding.

The application discloses a kind of impact-resistant composite material plate and its preparation method, the matrix of composite material plate is polyurea resin, reinforcing phase is continuous fiber material with filament length ≥1cm, and polyurea resin is wrapped around the continuous fiber material.The preparation method is: when the polyurea resin is slow reaction polyurea resin, the resin transfer molding method is used to form the composite material plate;When the polyurea resin is fast reaction polyurea resin, the reaction injection molding method is used to form the composite material plate.The application uses polyurea as matrix resin material, and uses continuous high-performance fiber as reinforcing material, and the composite material formed by the combination has excellent impact resistance, and can be used in impact resistance, bullet resistance and explosion-proof field.