92 results about "Low pressure molding" patented technology

A variety of embodiments are disclosed, in both apparatus and method form, that relate to the use of fabric material in the manufacture of an air bag deployment system. In addition, fabric weakening is disclosed according to a technique that does not result in physical alteration of the fabric. This invention therefore includes an air bag cover for an air bag safety system for a vehicle comprising a fabric outer layer having a frontside and a backside and a substrate containing an opening wherein the opening has a periphery. The substrate is preferably formed by low pressure molding, wherein the fabric outer layer overlies the opening in the substrate, and wherein the fabric outer layer is weakened at a location that is adjacent or overlies the substrate opening periphery.

The present invention discloses an LED module comprising: a waterproof enclosure; an LED accommodated in the waterproof enclosure; a wire for coupling the LED module with other LED modules and a driver; and a radiating unit set in the bottom of the waterproof enclosure and exposed to the external environment. The invention further provides an LED chain comprising the above said LED module and a driver coupled with the LED module. The LED chain according to the invention may have a high waterproof level, for example, IP65. The heat generated during the operation of the high power LED module may be transmitted to the external environment in time via a heat sink set on the LED module, thereby effective thermal management for the LED module and a long service life of the LED module may be obtained. Moreover, the finish surface of the driver may be made handsome by encapsulating the driver through the low pressure molding.

A method and apparatus for manufacturing. A fiber layer and a porous bonding layer are formed to form a unidirectional lay-up of fibers. The lay-up of fibers is heated under pressure to form a unidirectional composite tape of desired thickness to substantially maintain the fibers in a desired configuration. The unidirectional composite tape is slit to a desired width, and the slit unidirectional composite tape is loaded into a multiaxial fabric machine. A first layer is built from the composite tape in the multiaxial machine, and a second layer is built from the composite tape on the first layer at a predetermined angle from the first layer in the multiaxial machine. The first and second layers are consolidated to form a composite fabric in a continuous process.

A packaging structure of a low-pressure molded fuel cell comprises a hot melt adhesive layer, which is formed through a low-pressure molding process using a hot melt adhesive that has specific material properties and will become molten when being heated. The molten hot melt adhesive is injected into the cell via injection holes formed on a housing or a mounting element to flow through a C-sectioned flow channel, so as to tightly enclose and bond to edges of the air cathode and separator for the cell. After the hot melt adhesive is solidified, a chemical-resistant hot melt adhesive layer with good sealing and enclosing ability as well as high adhesion strength and elasticity, being bubble removed at controlled pressure and the hot melt adhesive material is formed to firmly bond to the cell components and tightly seal the cell, so as to effectively prevent electrolyte in the cell from leaking.

A plastic sheet able to be shaped by low-pressure moulding is proportionally prepared from unsaturated polyester resin, crystalline resin, low-shrinkage additive, trigger, polymerizing inhibitor, internal demoulding agent, filler and short glass fibers through mixing, thickening, shaping and packing. It can be moulded at 80-120 deg.C under 1-3 MPa for 2-3 hr.

This method for manufacturing a shaped product is characterized in preparing a specific random mat including a thermoplastic resin and carbon fiber bundles having an average fiber length of 5-100 mm, impregnating a thermoplastic resin into the random mat, pressing the random mat in a metal mold in a range of 0.1-20 MPa, and then taking out the random mat from the metal mold.

A method of molding components of a shopping cart using high or low pressure molding processes. The molding processes eliminate sink marks in plastic components of the shopping cart while providing structural integrity thereto. The processes used to mold the components of the shopping cart can create either or both a center channel in the molded components and/or a plurality of voids within the molded components. If hollow channels are formed in the molded components then the plurality of voids will be formed in the walls of such molded component if both processes are used together. The processes used to form the molded components are either (i) a gas assist process which provides a laminar stream of blowing agent into the stream of molten resin after the molten resin is forced into a partially filled mold or (ii) a structural foam molding process which provides a blowing agent blended into the molten resin prior to the molten resin being forced into the mold.

A method and apparatus for manufacturing. A fiber layer and a first porous bonding layer are formed to form a unidirectional lay-up of fibers. The unidirectional lay-up of fibers is heated under pressure to form a unidirectional composite tape. A first plurality of lengths of the unidirectional composite tape is laid down to build a first layer from the unidirectional composite tape. A second plurality of lengths of the unidirectional composite tape is laid down to build a second layer from the unidirectional composite tape on the first layer at a predetermined angle from the first layer. At least one of the first and second plurality of lengths of the unidirectional composite tape are slit while laying down the first and second plurality of lengths of the unidirectional composite tape. A composite fabric is formed from the first and second layer.

The invention discloses a low pressure molding package structure for a fuel cell, which comprises a shell, an air electrode and a separation film, a hollow fixing piece, and a hot melt adhesive layer. A plurality of air holes are formed on at least one surface of the shell and the periphery of an inner surface of each air hole is provided with a recessed first accommodating part. The air electrode and the separation film are superposed on the inner surfaces of the plurality of air holes. The hollow fixing piece is arranged in the shell, the surface adjacent to the separation film is provided with an annular flange in a projection mode, and a recessed second accommodating part is formed outside the annular flange. The second accommodating part and the first accommodating part enclose to form a C-shaped flow channel. A hot melt adhesive in a melting state is injected from an injection orifice of the shell or the fixing piece in a low pressure molding mode, so that the hot melt adhesive flows in the C-shaped flow channel and closely adheres and coats the edges of the air electrode and the separation film; and when the hot melt adhesive is cooled and cured, a circle of hot melt adhesive layer which has elasticity and adhesiveness and tightly compresses the air electrode is formed so as to block the leakage of the liquid in the cell.

This invention is a compression molded part useful for transportation vehicles and in construction and a process for making compression molded parts. These light weight parts are molded at pressures less than 500 psi (3.5 MPa) and are made from a sheet molding composition or bulk molding composition which incorporates a thixotrope such as fumed silica.

The purpose of the present invention is to provide: an intermediate substrate that has excellent handleability and followability for complex shapes, and also achieves good yield, excellent mechanical properties and low variation thereof, as well as excellent dimensional stability as a result of strength-reducing moulding defects, such as wrinkles and voids, occurring less readily when used in a fibre-reinforced plastic, even with low-pressure moulding; and a method for manufacturing a fibre-reinforced plastic, the intermediate substrate being used in said method. This pre-preg, which has a layer that contains reinforcing fibres impregnated with a resin composition, is characterised by: being a notched pre-preg; the rate of impregnation by the resin composition in the pre-preg being within a prescribed range; comprising reinforcing fibres, at least a portion of which is of a prescribed fibre length due to a plurality of notches; and having a reinforcing-fibre volume content Vf that is within a prescribed range.

The present invention discloses a production method of an abrasion connection harness, and relates to the field of the automobile harness production technology. The production method comprises the 13 steps: reception of raw materials, examination of the raw materials, wire cutting and skinning, crimping, assembling, crimping, assembling, conduction test, low pressure molding and examination, conduction test, final inspection and package. Through the optimization of the production process, the adoption of a plurality of technologies and checking at each level, the production method of an abrasion connection harness is able to ensure that materials or provides produced by each process may reach best technology qualities; and moreover, through strict control of technological parameters, produced harness products are ensured to reach the high standard so that the rejection rate is reduced, and a pipeline operation step is employed in the crimping and assembling steps so that the production efficiency is increased, the cost of enterprises is reduced, and the economic benefit is improved.

The invention discloses a paper sludge and urban living garbage biomass environment-friendly renewable energy fuel with advantages of low cost, easy combustion, high burnout rate, good desulphurization effect, and good water resistance, and a preparation method thereof. The environment-friendly renewable energy fuel is mainly composed of the components of, by mass: 40-65 parts of fine anthracite, 25-55 parts of paper sludge or urban living garbage, and 6-15 parts of additives. The preparation method comprises the steps that: the fine anthracite is screened, and dried paper sludge or urban living garbage is crushed, such that a maximal particle size is no larger than 3mm; the screened anthracite and the crushed dried paper sludge or urban living garbage are well mixed; the additives of a sulfur-fixing agent, an oxidant, and a water-proofing agent are well mixed; the mixed anthracite and the paper sludge or urban living garbage, the mixed additives, and a proper amount of water are well mixed; the mixture is molded by using a mold through wet low-pressure molding; and the molded material is cured under room temperature. The fuel provided by the invention can be widely applied in the field of environment-friendly renewable energy.

The invention relates to a direct current electric connector and an assembly method. The assembly method of the direct current electric connector comprises the following steps: 1. welding the direct current electric connector body and a wire; 2. packaging the welded direct current electric connector body and the wire through a low pressure molding forming mode so as to realize the assembly of the direct current electric connector. The direct electric connector comprises the direct current electric connector body and the wire which are connected by the low pressure molding forming mode. The invention has simple process and high production efficiency. The welding part of the direct current electric connector and the wire is packaged by the low pressure molding forming mode, which does not damage the component. The defective rate is low. The packaged products have tidy appearance, good hot-melt adhesive toughness, and high strength. The packaged wire effectively protects the welding point against the external force pulling, moreover the packaging part of the direct current connector body and the wire has efficiencies of insulation, temperature resistance, impact resistance, vibration reduction, damp proof, waterproof, dustproof and chemical resistance or the like.

The invention discloses an unsaturated polyester resin glass fiber prepreg for low-temperature and low-pressure forming. The prepreg is prepared from glass fibers, unsaturated polyester resin, nanometer magnesium hydroxide, crystalline solid polyester, a release agent, a coupling agent, isocyanate, unsaturated low-shrinkage resin and a curing agent, wherein the mass percentage of the glass fibersto the raw materials is 40%-65%, the mass percentage of the unsaturated polyester resin to the raw materials is 20%-50%, and the mass percentage of nanometer magnesium hydroxide to the raw materials is 1%-10%. The prepared glass fiber prepreg in the forming process and conditions of 2-6 MPa and 80-105 DEG C has properties of materials under normal compression moulding conditions of 7-10 MPa and 140-155 DEG C, the flexural strength and the impact toughness are improved, the moulding process is relatively simple, and the cost is obviously reduced. In addition, the invention further relates to apreparation method of the unsaturated polyester resin glass fiber prepreg for low-temperature and low-pressure forming.

The invention belongs to the technical field of continuous-casting funcational refractory materials, and relates to a combining system for low pressure moulding of continuous-casting three critical parts. The combining system comprises a binding agent and a solvent. The binding agent is composed of phenolic resin powder and CarboresP, the adding amount of phenolic resin powder is 4-6 wt% of the total weight of the continuous-casting three critical parts, and the adding amount of CarboresP is 1.5-3 wt% of the total weight of the continuous-casting three critical parts. The solvent comprises alcohol and methyl mixed dicarboxylate, the adding amount of alcohol is 2-3 wt% of the total weight of the continuous-casting three critical parts, and the adding amount of methyl mixed dicarboxylate is 1.5-2.5 wt% of the total weight of the continuous-casting three critical parts. By controlling the adding amount of high-boiling-point solvents, the high-volatility composition needed by low-pressure molding of blank materials is regulated and controlled; by introducing the binding agent with high residual carbon rate, the densification of the products is guaranteed, also the high-temperature strength of the material is improved, so that the combining system has obvious economic benefit and social benefit.

The invention discloses a novel hermetically sealed connector which comprises a connector body (1), a mounting screw (2), a seal ring (3), a plastic mounting plate (4) and a riveting nut (5), wherein the seal ring (3) is arranged between the plastic mounting plate (4) and a mounting plate (10); the riveting nut (5) penetrates through and is fixedly connected with the connector body (1) and the plastic mounting plate (4); the mounting screw (2) penetrates through the mounting plate (10) to be in threaded connection with the riveting nut (5) so as to realize the fixation between the plastic mounting plate (4) and the mounting plate (10); the tail end of the connector is partially provided with low-pressure moulding seal colloid (7); and the riveting nut (5) is provided with a positioning step (8) and a rivet-reserving part (9). The invention has the advantages of simple and compact structure, convenient processing, good sealing effect, reliable performance, high production efficiency, good size consistency, and high cost performance of mounting accessories.