1034results about "Foundry moulding apparatus" patented technology

The present invention provides a low viscosity photocurable composition including (i) a cationically curable component (ii) a free radically active component (iii) an antimony-free cationic photoinitiator (v) a free radical photoinitiator, and (vi) a toughening agent. The photocurable composition can be cured using rapid prototyping techniques to form three-dimensional articles which can be used in various aerospace and investment casting applications.

A precision-casting mold material for ornament consists of hydrogenated microcrystalline wax, paraffin, petroleum resin, high-molecular polymer, mineral wax and animal and vegetable wax. It has better bending strength, surface hardness, thermal stability, fluidity, reutilization and less linear shrinkage rate. It can be used for gold and silver ornaments.

In various embodiments, digital manufacturing of jewelry items is provided, including a physical process and software automation for implementing the physical process. Further, models formed during the process, as well as the resultant jewelry items, are provided. In some embodiments, the method comprises forming a digital model of the jewelry item, forming a physical model of the jewelry item based on the digital model, and manufacturing the jewelry item in a lost wax process using the physical model.

A rigid foamed polyurethane molding which reduce dust-scattering in cutting and is useful to a modeling stock. Said molding is produced by curing a composition by a mechanical frothing method, said composition comprising: a polyol with a filler (c); and a slight amount of dehydrating agent (d);wherein said composition further contains 3 to 30 percent, based on the total weight of the composition, of a (poly) oxyalkylene compound (e) expressed by the general formulain which "A" represents an alkylene group with two to four carbon atoms; "X" is a hydrocarbyl group or an acyl group; "m" is a value of one to one hundred; "n" is an integer of one to six; and "Z" is a residue produced by removing the active hydrogen atoms from a compound containing n active hydrogen atoms, in which at least one of Z and n X's has 5 to 20 carbon atoms.

The invention relates to a precise casting mold material, which comprises: petroleum wax, petroleum resin, high polymer, mineral wax and animal-plant wax. This product has high bending strength, superficial hardness, small linear shrinkage and ash, and well other properties, overcomes opposite in prior art, and fits to manufacture large-scale thin-wall integral fine-casting structure part.

The invention relates to a packing mold material used in investment precision casting, which comprises starch serving as a packing material, and further comprises petroleum wax, organic superpolymer, rosin and 5 to 20 percent by mass of tapioca. As tapioca is added in the packing mold material, the shrinkage ratio and the expansion ratio of the packing mold material can be controlled effectively, which is very important for controlling casting dimensional precision in investment precision casting. The tapioca is wide in source, and lower in cost than other packing mold materials, and does not react with an investment casting shell. The packing mold material has the advantages that the linear shrinkage ratio and the ash content are low and the strength, the smearing property and the flowability are better, thereby being suitable for manufacturing model wax of large thin-walled investment precision casting and ornamental article casting with higher surface quality requirements.

The invention discloses a wax mold manufacturing method of a melting mold precision-casting bridge shell. The wax mold manufacturing method comprises the following process steps: preparing a wax material, manufacturing a wax mold, finishing the wax mold and checking. According to the wax mold manufacturing method of the melting mold precision-casting bridge shell, the process defects of under-injection, cold separation, bubbling and the like in the wax mold manufacturing method of the melting mold precision-casting bridge shell can be overcome; and the product quality of a casting can be improved, the production efficiency is improved and the production cost is reduced.

The present invention provides a low viscosity photocurable composition including (i) a cationically curable component (ii) a free radically active component (iii) an antimony- free cat ionic photoinitiator and (v) a free radical photoinitiator. The photocurable composition can be cured using rapid prototyping techniques to form three-dimensional articles which can be used in various aerospace and investment casting applications.

Methods for forming an integral porous region in an orthopedic implant are provided. The method uses an orthopedic implant pattern, together with a porous framework having a plurality of reticulated interstices in a molding technique. After filling the mold with a molten metal such that the molten metal enters at least a portion of the reticulated interstices, followed by cooling, an orthopedic implant is formed. The porous framework is then removed to expose an integral porous region of reticulated porosity in the implant. The orthopedic implant may comprise a monolithic metallic body having an integral porous metal region. Reticulated porosity extends into the monolithic metallic body and is adapted to allow living tissue growth therein.

The invention discloses a single-crystal blade wax pattern combination assembly clamp and a single-crystal blade wax pattern combination assembly method. The single-crystal blade wax pattern combination assembly clamp comprises a base, wherein a rotary chassis, a rotary locking mechanism and a wax pattern fixing mechanism are arranged on the base, the rotary chassis is rotationally connected to the base and used for bearing a wax pattern bottom plate and wax pattern assembly units on the wax pattern bottom plate, the rotary locking mechanism is used for locking the rotation position of the rotary chassis, and the wax pattern fixing mechanism is arranged outside the rotary chassis and used for clamping and fixing the wax pattern assembly units; and the wax pattern bottom plate and the wax pattern assembly units rotate with the rotary chassis along the peripheral direction of the rotary chassis. Each wax pattern assembly unit on the wax pattern bottom plate can be in one-to-one correspondence with a wax pattern assembly unit position, and the wax pattern assembly units are mutually fixedly connected, thus assembly for the whole single-crystal blade wax pattern combination is completed. The single-crystal blade wax pattern combination assembly clamp and the single-crystal blade wax pattern combination assembly method are applicable to investment casting for single-crystal directional blades of various aero-engines and industrial gas turbines.

The invention belongs to the technical field of material processing engineering, and in particular relates to a resin casting mould rapid manufacturing method. The resin casting mould rapid manufacturing method is characterized by comprising the following steps of: (1) drawing a three-dimensional CAD (Computer-Aided Design) model of a mould according to a casting process drawing of a casting, and preparing a resin prototype for manufacturing a resin casting mould by a rapid prototyping device; (2) rapidly obtaining a die cavity for manufacturing the resin casting mould through a rolling over of a room temperature vulcanized silicone rubber mould by utilizing the prepared resin prototype; (3) manufacturing the resin mould through a manual paste mode by utilizing the die cavity for manufacturing the resin casting mould; and (4) assembling the resin mould prepared by manual paste on a mouldboard to complete the manufacturing process of the mould. Compared with the prior art, the invention has the advantages of facilitating design and modification to the appearance of the casting, being capable of rapidly obtaining the die cavity for manufacturing the resin casting mould, manufacturing the mould with a few tenths of millimeter of dimensional accuracy and shortening the manufacturing cycle of the mould.

The invention belongs to the technical field of precision casting and discloses a precision casting wax granular molding material and a preparation method and application of the precision casting waxgranular molding material. The precision casting wax granular molding material comprises components including, by mass percent, 50%-70% of petroleum wax, 0%-10% of animal wax, 10%-15% of mineral wax,0%-15% of vegetable wax, 0%-15% of petroleum resin, 0%-10% of flexibilizer, 0.0%-0.5% of an ultraviolet light absorbent and 0.0%-1% of an antioxygen. The raw material of petroleum wax is stable and easy to obtain, the petroleum wax serves as a raw material, the cost of the printing wax powder material is greatly reduced, meanwhile, the animal wax, the mineral wax, the vegetable wax, the petroleumresin, the flexibilizer and the like are added to improve the tenacity, the strength and the hardness, the molding material is low in viscosity and melting point and good in flowability, and the granular material is convenient to transport and process. By means of a formula without rosin, it is guaranteed that the casting wax can be repeatedly used several times and is good in environment affinity, meanwhile, the process is simple, the working efficiency is improved, the cost is reduced, and wide market prospects and market competitiveness are achieved.

The invention provides a material cutting machine. The material cutting machine comprises an operation table assembly, a support assembly, a supporting assembly, a rotating assembly and a cutting assembly, and further comprises a rectangular pedal, wherein a table leg transverse rod is arranged between two front operation table legs, the pedal is installed on the table leg transverse rod and can rotate with the table leg transverse rod as the axis, the front end of the pedal is located below a lead weight, and when the front end of the pedal is located at the highest point, the lead weight is supported by the pedal, and a cutting line is in a loosing state. A rotating shaft is adopted to drive materials to rotate, and regular circles can be cut out; the supporting assembly enables a support not to move easily when the machining is conducted; an upper screw rod and a lower screw rod rotate at the same time through a transmission shaft to regulate the position of the upper end and the lower end of the cutting line at the same time, and working efficiency is improved. The lower end of the cutting line is connected with the lead weight to tension the cutting line, and the appearance of a die which is cut out is much smoother. The pedal is further arranged, so that the cutting line is convenient to take down from or hang on an upper slide block, and the material cutting machine is convenient and rapid to use.

The invention discloses a wax pattern forming mould comprising a locking upper seat; an inward-concave first mounting cavity is formed in the bottom end of the locking upper seat; a forming female mould is arranged below the locking upper seat; the forming female mould is partially inserted into the first mounting cavity through an opening end of the first mounting cavity; a forming cavity used for forming a wax pattern matrix of a wax pattern is formed in the forming female mould; and the top end of the forming cavity is opened. A rib plate forming member is mounted in the first mounting cavity. The rib plate forming member comprises a first cover plate used for sealing the opening end of the forming cavity; and a plurality of rib plate forming movable blocks inserted into the forming cavity to form a plurality of rib plates are arranged on the first cover plate. A deep groove forming member used for forming a plurality of deep grooves are arranged on the first cover plate. The deep groove forming member comprises a plurality of deep groove forming movable blocks penetrating through the first cover plate to stretch in the forming cavity to form the deep grooves. A cam pushing mechanism for pushing the wax pattern upward out of the forming cavity at the time of demoulding is connected to the lower portion of the forming female mould.

The invention provides a method for preparing a wax mold of a monocrystal spiral crystal selector. The wax mold of the monocrystal spiral crystal selector comprises a seeding section wax mold, a spiral crystal selecting section wax mold and a transition section wax mold which are sequentially connected from bottom to top. The method comprises the following steps: firstly, manufacturing the seeding section wax mold and the transition section wax mold; winding on a screw corresponding to the size of the required spiral crystal selecting section by a plastic welding rod, sizing for a moment, immersing into 58# refined paraffin liquid at 68 DEG C, taking out after 4-7 seconds so as to obtain the spiral crystal selecting wax mold; connecting two ends of the spiral crystal selecting wax mold with the bottom of the transition section wax mold and the top of the seeding section wax mold respectively by utilizing bonding wax which is heated to be 130 DEG C. According to the invention, the crystal selector wax mold which meets the requirement can be prepared rapidly; compared with the traditional method using a wax injector and a wax mold, the method has the characteristics of no need of wax injector equipment, no need of machining the wax mold, low expense, simplicity in operation, short consumption time, high efficiency, high yield and the like.

The invention discloses a precisely cast low-temperature modulated wax and a preparation method thereof. The precisely cast low-temperature modulated wax comprises the following raw materials in parts by weight: 44-46 parts of microcrystalline wax, 2.5-3.5 parts of lignite wax, 34-36 parts of rosin resin, 3.5-4.5 parts of an ethylene-vinyl acetate copolymer and 12-14 parts of pure monomer resin. The wax disclosed by the invention is applied to a precision casting industry, has stability, hardly deforms due to high strength and hardly pollutes the metal cast due to low gray scale, is easy to demold, can be melted together with a wax mold to flow out of a shell during demolding; and the production rate can be effectively improved in the precision casting process.

The invention discloses a method for preventing deformation of a refined casting casing wax model. The method comprises the steps that the shape of the wax model and the shape of a mould for the wax model are determined according to the structure of a casing, and positioning blocks are arranged on the mould; the mould is subjected to wax injection, the wax model is obtained, and reinforcing ribs are embedded between the positioning blocks of the wax model and connected for structural reinforcement; the wax model is taken out of the mould to be detected; then a gating system and risers are welded to the wax model; and finally, shell making, casting pouring and thermal treatment are conducted, and cleaning is conducted before the casing is obtained. According to the method for preventing deformation of the refined casting casing wax model, the deformation situation of the wax model is considered in the mould design stage, the reinforcing ribs are designed, the positioning blocks are reserved, the well prepared reinforcing ribs are assembled on the wax model which is then taken out of the mould, accordingly deformation of the wax model is controlled, the deformation quality problem of the wax model in the production process of the heavy duty gas turbine casing is finally solved, the operating process is simplified by adoption of the method, and risks caused by calibration for the wax model are lowered; and a calibration mould and tool do not need to be made independently, and the production cost is lowered.

The invention discloses a wax pattern correcting tool which comprises a bottom plate, wherein a first correcting device which is used for correcting a wax pattern crown and a second correcting device which is used for correcting wax pattern rabbet and body are at least fixedly arranged on the bottom plate; the first correcting device and the second correcting device have the same structure, and respectively comprise a correcting surface fixing plate installed on the bottom plate, as well as a correcting surface fixing bracket I and a correcting surface fixing bracket II; a cover plate is arranged on the correcting surface fixing plate; the correcting surface fixing bracket I and the correcting surface fixing bracket II are used for clamping the corresponding parts of the wax pattern; the correcting surface fixing bracket II is installed above the correcting surface fixing bracket I and is hinged with one end of the correcting surface fixing bracket I; the correcting surface fixing bracket I extends to the part above the cover plate from the interior of the cover plate; the other ends of the correcting surface fixing bracket I and the correcting surface fixing bracket II are clamped or released through a quick clamp; the height of the cover plate can be adjusted relative to the correcting surface fixing plate, and the cover plate is fixed through hexagon socket cap screws after the height is adjusted; and the inclination angle of the correcting surface fixing bracket I can be adjusted relative to the cover plate, and the correcting surface fixing bracket I is fixed by screws after the angle is adjusted.

The invention relates to an organized chip array wax block module, wherein it comprises mould element and array grid plate; said array grid plate is arranged with several post grids uniformly; the bottom of mould has array holes relative to the post grids; the post grids are through the bottom of mould element to pass the array holes into mould element groove; the array grid plate is movably matched with array hole; and there is a packing box movably matched with mould. In addition, the moulds can be two types that the groove bottom of mould has one upwards integrated post grid; the middle ofgroove has array hole plate and the array grid plate through the array hole; the lower surface of array grid plate has post grid, and upper surface has handle; the post grid is movably matched with array hole plate. The invention has the advantages that: it has high producing speed, high quality, and one-time molding; and it can increase the points of micro array, to plant more organized chips into one array wax block, to improve the producing efficiency and quality.

The invention discloses a casting die easy to strip, which comprises a lower die, an upper die, a lower die pouring opening and an upper die pouring opening. The casting die is characterized in that the lower die is provided with a vertical first through cavity and a horizontal second through cavity which is communicated with the first through cavity; a sliding block which is matched with the first through cavity is arranged in the first through cavity; a flat plate is arranged in the second through cavity; and both ends of the flat plate extend out of the second through cavity and are connected with the sliding block by a connecting piece. By adopting the technical scheme, when the casting die easy to strip is stripped, the flat plate drives the sliding block to move in the first through cavity up and down to achieve the aim of easy stripping; and the invention not only can omit the process that a wax die is taken directly with hands for stripping, but also ensures the stripping verticality.

The invention provides a method for manufacturing a high temperature resistant casting resin-die, advantageous in comprising the following steps: 1. making a structural design for a die by drawing a three-dimensional modeling for the die through a three-dimensional software; 2. processing the three-dimensional modeling into a rapid prototype in an NC machine tool after conducting an NC programming; 3. manufacturing a silicone-rubber die for the high temperature resistant resin-die by using the rapid prototype and silicone rubber turnover-formwork technique; 4. first brushing a surface-layer resin material over the cavity of the silicone-rubber die, then after the solidification of the surface-layer resin material, brushing a back-layer resin material on the surface-layer resin material, pressing to make the two layers of resin material adhere to each other and the aggregate thickness thereof reaching 20mm+/-5mm, and taking the two solidified layers of resin materials out of the silicone-rubber die after the back-layer resin material is solidified to obtain the high temperature resistance casting resin-die. The high temperature resistance casting resin-die of the invention, having high machining precision, short manufacturing cycle and low costs, can be applied to the manufacturing of foaming mould by lost foam or the precision casting of wax die through lost wax.