72results about How to "Good molding precision" patented technology

The invention discloses a three-dimensional printing method, wherein a melt enters a three-dimensional printing device to print a finished product. The three-dimension printing device comprises a three-dimensional moving mechanism, a working platform mechanism and a computer control and driving system; the melt is made from a modified nylon material formed by a nylon resin matrix and a tackifying nucleating agent; the tackifying nucleating agent is prepared by compounding of ion liquid and nano carbon filler; and the ion liquid is formed by anions and cations, wherein the anions are alkyl imidazole ions. The device disclosed by the invention has the advantages of being simple and compact in structure, high in automation degree, easy to control, high in precision, high in efficiency and high in adaptability; the modified nylon material provided by the invention can effectively avoid edge warping during 3D printing; and a finally printed product has the advantages of being excellent in mechanical property, good in dimension stability, smooth in surface, low in cost and the like.

The invention discloses a manufacture method of a high-precision carbon fiber composite antenna panel. According to the manufacture method, the high-precision carbon fiber composite antenna panel is manufactured by the steps of manufacturing with a die, forming a skin, forming a panel, assembling and protecting and the like. Compared with an existing panel manufacture technology, the manufacture technology of the high-precision carbon fiber composite antenna panel has the characteristics that a negative-pressure forming technology is used; by changing the panel material, the disadvantage of poor precision in manufacture of an aluminum alloy tensile skin is avoided, and the advantages of easy film adhesion and good forming precision of the carbon fiber material are brought into full play. Meanwhile, the antenna panel manufactured by the method is high in precision and light in weight.

A tire cord (10) comprises a core (11) made of aramid fibers twisted together at a twist pitch (P1), and a sheath (12) composed of at least one strand (14) made of aramid fibers and wound around the core at a winding pitch (P2), wherein the winding pitch (P2) is less than the twist pitch (P1), and the total fineness (A) of the aramid fibers constituting the core (11) is less than the fineness (B) of the aramid fibers constituting each strand (14) of the sheath (12). A pneumatic tire (1) comprising a reinforcing layer, e.g. tread reinforcing layer made of the tire cords (10).

Provision of a molding material excellent in molding accuracy without using a silicone resin and suitable for use in producing a molded body having high hardness and excellent appearance; a resin film formed from the molding material; a molded body obtained by using the molding material as a starting material; and a method for producing the molded body. A molding material used as a starting material in producing a molded body, containing a (meth)acrylic resin emulsion, a polyfunctional (meth)acrylic acid ester and a polymerization initiator; a resin film formed from the molding material; a molded body including a substrate and a molding material layer formed on the substrate wherein the molding material layer is formed from the molding material; and a method for producing the molded body.

The invention discloses a special-shaped cable and a preparation method thereof. The conductive core of the special-shaped cable is composed of at least two conductive core segments in an end-to-end way, wherein the cross sections of the conductive core segments are different in shape. The conductive core segments are externally wrapped by an insulating layer. The contour of the insulating layer is fit with the conductive core segments. The cable has great bending performance and can also be greatly fit with a vehicle body so that consumables can be saved and the safety performance can be greatly enhanced. The cable is made of the aluminum or aluminum alloy conductive cores so that the vehicle body is enabled to be light-weighted, and the production cost of the motor vehicle can be reduced. The preparation method of the special-shaped cable comprises the steps of manufacturing the conductive core segments, connection of the conductive core segments and manufacturing of the insulating layer so that the production efficiency and the productivity can be effectively enhanced according to different production requirements and the production cost can be reduced.

The invention relates to the technical field of 3D printing and provides a fiber enhanced composite material annularly coated printing nozzle. The fiber enhanced composite material annularly coated printing nozzle comprises a feeding part, an extruding mechanism, an impregnating cavity, an annularly coated nozzle and a measuring and controlling part, wherein the feeding part is primarily used forproviding a resin material quantitively at a constant speed and the lower end of the feeding part is connected to the extruding mechanism; the resin is extruded at the constant speed under the actionof a heating ring and a screw to enter the impregnating cavity; in the impregnating cavity, the resin and the fibers are mixed and are extruded and formed through the annularly coated nozzle. The bottom end of the annularly coated nozzle is of a planar structure. The formed surface can be compacted after the composite material is formed, so that the inner porosity is reduced, and the laminar bonding effect is improved. In the printing process, a plurality of temperature and pressure parameters need to be collected and controlled. The printing nozzle mixes the resin and the fibers quickly and efficiently on the one hand, and compacts and prints the resin and the fibers on the other hand, so that the mechanical property of a formed part can be improved.

The invention discloses a preparation method of a laser 3D-printed complex-configuration silicon carbide composite part. The preparation method comprises the following steps that (1) preparing composite raw powder for laser 3D printing, wherein the composite raw powder comprises, by volume percent, 10-70% of chopped carbon fibers, 20-70% of silicon carbide, 20-50% of organic resin with a carbon residue rate larger than 35%, and 5-20% of carbon black; (2) molding the composite raw powder into a silicon carbide composite biscuit with a complex configuration by adopting a laser 3D printing method; (3) degreasing the biscuit in a vacuum atmosphere to crack and carbonize the organic resin and form a degreased biscuit completely composed of inorganic matters; and (4) carrying out liquid-phase reaction siliconizing on the degreased biscuit in a vacuum environment to obtain the laser 3D-printed complex-configuration silicon carbide composite part.

A bracket for protecting the liquid crystal display (LCD) of a portable display device comprises (A) a polyamide resin, and (B) a carbon fiber, wherein the ratio of (A):(B) of the (A) polyamide resin and the (B) carbon fiber is about 20 to about 40 wt %: about 60 to about 80 wt %, and the (A) polyamide resin comprises (a1) an aromatic polyamide and (a2) an aliphatic polyamide including a C₁₀ to C₂₀ aliphatic group.

The invention relates to the technical field of composite materials for automobiles, in particular to an ABS (acrylonitrile butadiene styrene) composite material for an automobile and a preparation method thereof. By using ABS as a base material and HDPE (high-density polyethylene) as toughening synergist and by adding heat-resistant modifier, ABS high-rubber powder, antioxidant and lubricant, the obtained ABS composite material for the automobile has the advantages of heat resistance, better non-notched impact performance, simple processing technology and high product molding accuracy. Since components such as the heat-resistant modifier, the ABS high-rubber powder, the HDPE, the antioxidant and the lubricant which are used for preparing the ABS composite material for the automobile are commercially available products which are low in cost and easy to obtain, the production cost of the ABS composite material is lower, the market prospect is better and the ABS composite material has a very wide market in fields such as automobile interior and exterior decoration, electronic products and electric appliances.

The invention relates to a method for preparing a coating by 3D printing overlapping an electron beam. Metal or ceramic powder and metal/ceramic powder are printed on the surface of a base material layer by layer through 3D printing, layer-by-layer printing is carried out by a three-dimensional model according to the set layer thickness, and then the metal or ceramic powder and metal/ceramic powder on the surface of the base material are preheated to form a fusion layer. A heating device used for the preheating includes a high-frequency vibrator and an induction heating coil which are placed on a workbench, the high-frequency vibrator acts on the bottoms of the fusion layer and the base material, the induction heating coil is arranged around the base material for preheating, after preheating is carried out, the fusion layer is melted with the electron beam to form a metal/ceramic. composite coating, and finally the metal/ceramic composite coating is subjected to post-heat treatment through the induction heating coil. The product development cycle is greatly shortened, production rate is improved, and the production cost is reduced.

The invention discloses a three-dimensional molding device and method based on a film substrate. The device comprises a feeding mechanism, an exposure mechanism, a supporting mechanism and a separating mechanism, wherein photosensitive material layers are sent to corresponding exposure areas through the feeding mechanism and then are exposed through the exposure mechanism so that solidification generation of each layer of specific pattern can be achieved, and the patterns on all layers are stacked to form a required part on the supporting mechanism; separation and exposure are conducted synchronously, a film substrate material layer is gradually separated from the top surface of the formed part on the supporting mechanism as the separating mechanism moves rightwards under the action of tension, and unexposed photosensitive material layers are stripped off to the space outside the supporting mechanism at the same time. By conducting exposure and separation synchronously, working efficiency can be improved, and requirements for large breadth, high efficiency, high precision and low cost during three-dimensional entity manufacturing are met.

The invention relates to a tire pasting drum with an ultra-large expansion and shrinkage ratio, which is used for forming a radial tire blank. The pasting drum comprises a power transmission mechanism, a drum tile expansion and shrinkage mechanism and an expanded drum diameter adjustment mechanism, and is characterized in that the drum tile expansion and shrinkage mechanism comprises a driving seat, long connection rods, sliding blocks, main tiles and auxiliary tiles; the driving seat is connected with an inner shaft through connection blocks; the long connection rods are respectively hinged with the driving seat and the sliding blocks through pin shafts; the main tiles are arranged on the sliding blocks; one edge of each auxiliary tile is fixed on the corresponding main tile, and the other edge of each auxiliary tile is hasped onto the adjacent main tile, so that the ultra-large expansion and shrinkage ratio can be obtained, and slits among drum tiles during drum expansion are eliminated; and therefore, the tire manufacturing specification range of equipment is greatly expanded, and the tire blank forming quality is improved; the expanded drum diameter adjustment mechanism is adjusted by a built-in screw; a handwheel rotation screw moves a nut to limit the travel of the inner shaft, so that the aim of adjusting the diameter of an expanded drum is fulfilled; the specification of the pasting drum is convenient to adjust, and the pasting drum is high in operation safety.

The invention discloses a device conducting composite manufacturing on the basis of a laser technology. The device comprises a sealed forming chamber, an inert protective gas source and a machining forming platform. The inert protective gas source is connected with the sealed forming chamber. The machining forming platform is arranged in the sealed forming chamber, and a light path selection system is arranged over the machining forming platform. A machining station is arranged on the machining forming platform, and the machining forming platform is arranged on a guide rail and can slide forwards and backwards through the guide rail. The light path selection system comprises a shock reinforcing independent laser light path, an additive independent laser light path and a subtractive independent laser light path. The light paths are arranged in the direction of the guide rail, and all the independent laser light paths do not share equipment and are arranged over the machining forming platform. According to the device, the laser shock reinforcing technology and the laser additive and subtractive technology are integrated, the forming precision, the surface quality, the organization performance and the residual stress state of a complex fine additive workpiece are improved, and one-stop high-efficiency high-precision and high-performance additive workpiece preparation is achieved.

The invention discloses a method for processing a V-shaped groove of a stainless steel composite plate. The method comprises planing processing and milling processing. The planing processing means the operation of cutting a flat groove on the surface of the tainless steel composite plate, the position of the flat groove is at the middle of the V-shaped groove, the width of the flat groove is smaller than the edge of the V-shaped groove, and the depth of the flat groove is obtained by cutting off a stainless steel surface layer until a composite layer is exposed. The milling processing means the operation of utilizing a V-shaped milling cutter to perform milling in the flat groove until the V-shaped groove in the stainless steel composite plate is formed. According to the method, a processing mode of first performing planing and then performing milling is adopted, the V-shaped groove is processed in the stainless steel composite plate by utilizing the characteristics of small planing resistance and high milling forming accuracy, and the method has the advantages of easiness in cutting, high working efficiency and good forming accuracy.

The invention provides molding equipment for an anti-seismic bracket, and belongs to the technical field of seismic resistance of building electromechanical engineering. The molding equipment comprises a rack base, a hole making device, calendering devices, a rib pressing device, a gear hobbing device, a first small edge molding device, a second small edge molding device and a vertical edge molding device; the hole making device, the calendering devices, the rib pressing device, the gear hobbing device, the first small edge molding device, the second small edge molding device and the verticaledge molding device are arranged side by side in sequence. According to the molding equipment, the molding process of the anti-seismic bracket can be achieved quickly, and the anti-seismic bracket hasthe advantages of high molding accuracy, the rational structure and high degree of automation.

A press mold for fabricating a glass substrate, the glass substrate comprising a substrate; and a terrace-shaped flat portion formed on the substrate and having a grooved portion formed therein, is characterized in that the press mold comprises a top mold and a bottom mold; at least one of the top mold and the bottom mold having an indented portion formed therein so as to correspond to the terrace-shaped flat portion, the indented portion having an entire periphery surrounded by a mold reference surface.

The invention provides a door seal ring, a door assembly and clothes processing equipment. The door seal ring is provided with a matching body and an abutting seal part which are connected with each other; the abutting seal part comprises a first lip and a second lip connected with each other. According to the technical scheme, the abutting seal part is separated from a tub assembly when a door body is opened, and the abutting seal part is abutted against the tub assembly when the tub assembly is covered with the door body; thus, the sealing between the movable door body and the tub assembly is realized, water leakage of the tub assembly is prevented effectively, and seal reliability and safety of the product are guaranteed; further, since the abutting seal part and the tub assembly are inabutting fit, and the door seal ring keeps in abutting against the tub assembly through its elasticity and can move synchronously with the tub assembly, the leakage between the door body and the tubassembly can be avoided, and the seal reliability of the door body can be improved.

The invention discloses a great drop mountain directional drilling crossing construction method, comprising the following process steps: 1) determining a soil coming-in position and a soil coming-outposition, through a drilling tool, drilling along the direction from the soil coming-in position to the soil coming-out position, to realize construction processing of a guide hole; 2) withdrawing thedrilling tool along the direction from the soil coming-out position to the soil coming-in position, after the drilling tool is changed to a hole expanding device, through the hole expanding device, drilling along the direction from the soil coming-in position to the soil coming-out position, to realize hole expanding construction processing; 3) in the hole in which hole expanding construction processing is completed, placing a pipe which is to be laid in the hole along a drag direction from the soil coming-out position to the soil coming-in position, the pipe being dragged by the hole expanding device. Compared with a conventional directional drilling process, in the great drop mountain directional drilling crossing construction method using the above technical scheme, pushing processingof the hole expanding device from the soil coming-in position to the soil coming-out position is used in a hole expanding stage, control of a guide curve in an operation process can be effectively improved, so that a hole expanding path tends to be a line, and hole expanding precision is improved.