51results about How to "Reduce extrusion resistance" patented technology

The invention discloses a puffing machine which is used for starch-rich material puffing, belonging to puffing-machine field. It mainly comprises: main axle, pressure ring, segmented bolt, feeding cavity, segmented compression cavity, discharging device and squeezing air spout. A cylindrical diverting body is fixed between segmented bolt and squeezing sir sprout, the outer surface of diverting body is equipped with a plurality of spiral directional slots, the two ends of directional slot extend to the two ends of diverting body, the rotary direction of directional slot is in accordance with that of bolt. The material can be diverted evenly and fed into squeezing air sprout and discharged from squeezing air sprout continuously because of the homogenous distribution of directional slots on the circumference. The continuous material discharging guarantees device stability, and because the diverting body provides a propelling force, the material with large adhesiveness can also be conveyed easily, and the machinery energy consumption is reduced, productivity is increased.

The present invention discloses preparation process of composite material of hemp stalk and plastic. The composite material is prepared through mixing hemp stalk powder and mineral powder to obtain composite hemp stalk powder, extruding and pelletizing to obtain composite hemp stalk pellet, mixing with plastic, and pelletizing or extruding into product. The composite material is environment friendly, reusable and low in cost.

The invention provides a seven-stage adjustable rotary type electrorheological fluid brake. The seven-stage adjustable rotary type electrorheological fluid brake mainly comprises a positive pole conducting wire, a negative pole conducting wire, a bearing cap, a bearing, an end closure, conductive rubber, a half round key, a rotating shaft, an insulated shell, a positive pole, a negative pole, a backflow control channel, a small turntable, a middle turntable, a large turntable, electrorheological fluid and a flat key, wherein the installation type of the small turntable, the middle turntable and the large turntable is decided by suffered braking force, when the braking force is large, the stress is not clear and the rotating speed is high, the dual-turntable and three-turntable type is adopted; when the braking force is small, the single-turntable type is adopted; the backflow control channel is used for replacing a throttling control valve, an external electric field is not applied, and the electrorheological fluid is stressed, flows between the upper part and the lower part of the insulated shell through the backflow control channel and is a hydraulic brake; when the external electric field is applied and the high shear rate is adopted, the apparent viscosity of the electrorheological fluid of the backflow control channel changes, so that the sectional area of the electrorheological fluid becomes small till being completely closed; and the electrorheological fluid realizes the effective brake on an engineering system by providing shear force and extrusion force.

The invention provides a polymer melt shear vibration extrusion molding device which comprises an extruding machine 13, an extrusion head 1 connected with the extruding machine through a flange plate, a mouth mould 12, a stock mould 14, a cooling water tank 15, a traction device 16 and a cutting device 17, and is characterized by further comprising a crank connecting rod shear vibration system 18 and a melt runner vibration chamber 2, wherein the crank connecting rod shear vibration system 18 is arranged above the extrusion head 1; the melt runner vibration chamber 2 is arranged inside the extrusion head 1; the crank connecting rod shear vibration system is composed of a crank connecting rod mechanism and a reciprocating vibration rod 3; the reciprocating vibration rod 3 is positioned in a through hole 9 formed in the extrusion head 1; the through hole 9 is communicated with the melt runner vibration chamber 2. The device provided by the invention not only can simultaneously promote polymer molecule chain orientation, shish-kebab structure generation and polymer crystalline grain refinement, and improve mechanical property of products, but also can reduce extrusion resistance and improve production efficiency.

The invention discloses an extruding device of a porous hard alloy profile. A mold system thereof consists of a core rod bracket (11), an extrusion core rod (12), a mold (13) and a mold sleeve (14), which are movably assembled in a die set (1); a pressing cylinder system comprises a front pressing cylinder (3), a rear pressing cylinder (4), an extrusion pushing rod (7) and a rear end cover (6), wherein the rear pressing cylinder (4) is provided with an air vent; an air exhaust opening (5) above the air vent is coupled with a vacuumizing system; the extrusion pushing rod (7) passes through therear end cover to be connected with a hydraulic system; and the die set (1), the front pressing cylinder (3), the rear pressing cylinder (4) and the rear end cover (6) realize sealing connection by fastening screws and a pull rod mechanism so as to form an extrusion device body. The length of the hard alloy profile and the hole diameter of the inner hole, extruded by the device, are not limited, the extrusion process is ensured under vacuum state to ensure good internal quality of an extruding part, and the difficulties that the existing porous high-performance hard alloy has short profile length, large size of the hole diameter, and air holes in the inner part when being extruded and molded are solved.

The present invention relates to a plastics wood composite material and its preparation method. Said method includes the following steps: firstly, pulverizing laminate structure mineral, adding coupling agent while stirring to obtain coupled laminate structure mineral powder; adding coupling agent while stirring wood powder to obtain coupled wood powder; mixing coupled wood powder and coupled laminate structure mineral powder to obtain composite wood powder; mixing the obtained composite wood powder, plastics and adjuvant; then extruding by using extruder so as to obtain the invented plastics wood composite special-purpose material.

The invention relates to a novel die for continuously extruding aluminum pipes, aluminum alloy pipes and special-shaped hollow profiles, comprising a die arranged in a cavity in an integral structure. A front deflector of the die, which is provided with at least three special-shaped shunt holes, is connected with an upper die of the die; the shunt holes of the front deflector form an inclined angle; a die core arranged on the upper die forms the inside diameter of a pipe, and a lower die connected with the upper die is provided with a welding cavity and a mold; the shunt holes of the front deflector form the angle of 18-20 degrees; the upper die and the lower die of the die are positioned by pins and are connected by screws; the die is connected with the cavity by a locking nut; the diameters of the upper die and the lower die are from 60*52-0.1mm to 60*52+0.1mm; and the mold and the die core are made of hard alloy materials. The invention improves the production efficiency of the aluminum alloy extrusion pipes or the special-shaped profiles by approximate 15 percent, decreases the production cost, prolongs the service life longer than twice, can produce the aluminum alloy pipes and the special-shaped profiles in various shapes and specifications and has good product quality and wide economic benefits.

The invention discloses a method for preparing a recrystallized silicon carbide product through a plastic method. The recrystallized silicon carbide product is prepared from, by mass, 60-70 parts of silicon carbide coarse powder, 30-40 parts of silicon carbide fine powder, 1-3 parts of plasticizer and 1-3 parts of a lubricating agent, and the particle size of the silicon carbide coarse powder is 20-150 micrometers; the particle size of the silicon carbide fine powder is 0.2-2 micrometers. The method includes the following steps that silicon carbide coarse powder is subjected to ball-milling and shaping, and shaped silicon carbide coarse powder is obtained; the silicon carbide fine powder is subjected to wrapping treatment with a poly ethylene diamine solution, and modified silicon carbide fine powder is obtained; the modified silicon carbide fine powder and plasticizer are mixed to be uniform, the shaped silicon carbide coarse powder, water and the lubricating agent are added, kneading is conducted, and plastic silicon carbide sludge is obtained; the plastic silicon carbide sludge is squeezed, wet greens are obtained and then dried, and green bodies are obtained; the green bodies are sintered and output out of a furnace, and the recrystallized silicon carbide product is obtained. The volume density of the recrystallized silicon carbide product is 2.5-2.65 g/cm<3>, and the bending strength at the room temperature is 80-110 MPa; compared with a slip casting method, production efficiency is high, the cycle is short, the cost is low, homogeneity of the product is good, and reliability is high.

The invention discloses a low mouth die accumulated material polyolefin alloy thermoplastic elastomer and a manufacturing method thereof. EPDM (ethylene propylene diene monomer), PP (polypropylene), white oil, PPA (phenylpropanolamine) powder, silicone master batches, peroxide, high-activity crosslinking agents, low-activity crosslinking agents, antioxidants and lubricants are granulated by two-step double screws to prepare the elastomer, and the resistance of a die orifice in extrusion is reduced. Besides, by compound use of the crosslinking agents, the crosslinking degree of products is improved, and die swelling of the products is reduced, so that mouth die accumulated materials are reduced.

The invention provides a processing method of a self-lubricating phosphor copper ball extrusion die. The processing method of the self-lubricating phosphor copper ball extrusion die is a method of using a series of treatment processes of 4Cr5MoSiV1(H13) normalizing, tempering, quenching, deep cooling, sulfur carbonitriding and the like for performing self-lubricating treatment on a die for extrusion of copper balls. By using the processing method of the self-lubricating phosphor copper ball extrusion die, the die is high in internal hardness and strength, carbide and nitride of ferrum, molybdenum and chromium are generated on the surface of the die, and simultaneously molybdenum and ferrum sulfide is generated. The die is small in deformation and stable in shape due to the high hardness and the high strength of the die, and the carbide and the nitride which are generated on the surface of the die have high hardness, and therefore the die has good wear-resisting performance under supporting of a high strength and high hardness substrate. Furthermore, the molybdenum and ferrum sulfide is of laminar structure, and thereby has good oil storage and lubricating functions, reduces extrusion resistance, and prolongs life of the die.

The invention belongs to the technical field of powder high-temperature alloy, and relates to a powder high-temperature alloy horizontal extrusion integrated sheath and a manufacturing method thereof.The integrated sheath consists of a powder nozzle, a sheath upper cover, a sheath outer wall and a sheath tail pad, and all the components are made of stainless steel and are welded; and vacuum annealing is carried out after welding, so that the sealing performance of the sheath is guaranteed, and air leakage of the sheath in a powder treatment and hot isostatic pressing implementation process isprevented. The sheath can be used as a powder sheath, and hot isostatic pressing is carried out after treated powder is filled, so that densification of the high-temperature alloy powder is realized;the sheath can also be used as a sheath of a subsequent hot extrusion process, a heat preservation effect is achieved in the extrusion process, temperature drop of a high-temperature alloy ingot blank body is reduced, and the extrusion resistance is reduced; the sheath tail pad is additionally arranged, and can be used as an extrusion blank for pressing, so that the waste of the powder high-temperature alloy is reduced; and meanwhile, the integrated design is adopted to simplify the manufacturing process of the sheath, so that the cost is reduced, and meanwhile, the extrusion stability is improved.

The invention relates to a manufacturing method for a thin-wall large-specification honeycomb ceramic carrier die capable of being repeatedly coated. The carrier die comprises a main die. The main die is provided with a plurality of feeding holes and discharging grooves corresponding to the feeding holes. The manufacturing method comprises the steps that a die plate blank is manufactured through die steel or other alloy steel; a feeding hole drilling machining program is compiled, and drilling is conducted through a numerical control deep hole drill; a linear cutting machining program is compiled, and the discharging grooves are machined on a linear cutting machine tool; pre-extrusion is conducted on an extrusion machine, and the inner surfaces of the feeding holes and the inner surfaces of the discharging grooves are ground to remove burrs and to be polished; the surfaces of the feeding holes of the carrier die and the surfaces of the discharging grooves of the carrier die are subjected to first-time coating machining; first-time batched honeycomb ceramic production is conducted through the coated carrier die, and after a certain number of ceramic blanks are extruded and formed, the feeding holes and the discharging grooves of the carrier die are subjected to second-time surface coating machining; and the carrier die subjected to second-time coating is utilized for conducting second-time batched production, and coating machining is conducted again after production.

A straw dehydration extrusion forming machine is used for dehydrating and processing smashed straw into block materials, and is provided with a machine frame; an auger and a material pressing pipelineare installed on the machine frame; the material pressing pipeline is composed of a material pipe and a conical pipe, the material pipe is provided with a feeding inlet, one end of the material pipeis a blind end, the opening of the other end of the material pipe is connected with a flaring flange of the conical pipe, the narrow opening end of the conical pipe is a discharging outlet, and the pipe wall of the conical pipe is provided with a plurality of gas-liquid discharging holes; and the auger is provided with a main shaft, one end of the main shaft is rotationally connected to the machine frame, the other end of the main shaft is arranged in the material pressing pipeline, a shaft body of the main shaft is fixedly connected with a spiral rib sheet, and the axis of the main shaft coincides with that of the conical pipe. The straw block materials which are high in density, small in size and low in water content can be obtained by processing the smashed straw through the straw dehydration extrusion forming machine and can be directly used as fuel for a power plant, storing and transporting are facilitated, and the recycling cost of the straw is reduced.

The invention relates to a server slide rail with an automatic buckling device. The server sliding rail comprises a drawer cabinet body and a slide rail assembly, wherein the slide rail assembly comprises an inner rail and an outer rail, wherein the inner rail relatively slides on the outer rail and the inner rail is connected with the drawer cabinet body; the automatic buckling device is arranged between the drawer cabinet body and the slide rail assembly; the automatic buckling device comprises a lock catch assembly arranged on the drawer cabinet body and a buckling assembly arranged on the outer rail; the lock catch assembly and the buckling assembly are mutually locked or unlocked; the lock catch assembly comprises an elastic resetting and rotary buckling block; the buckling assembly comprises a clamping hook, a movable block and a fixed block; when the slide rail assembly is closed, mutual line contact between the buckling block and the clamping hook is converted into mutual face contact and the buckling block and the clamping hook are finally buckled; the buckling block is driven to be released from the clamping hook and the sliding rail assembly is unlocked; the clamping hook is arranged on the movable block and the fixed block is arranged on the outer rail; the movable block is elastically pressed on the fixed block. According to the server sliding rail with the automatic buckling device, the line contact is converted into the face contact, so that an acting force is reduced, buckling resistance is reduced and automatic buckling is easily realized.

The invention provides an extrusion spray-head structure of an FDM (Fused Deposition Modeling) 3D printer. The extrusion spray-head structure comprises a heating block, a wire conduit and a nozzle, wherein the nozzle is arranged at the bottom end of the wire conduit; the heating block is arranged at the part in which the nozzle is connected with the wire conduit; a teflon tube is arranged in the wire conduit, and a stainless steel tube is arranged at the bottom end of the teflon tube and corresponding to the heating block in position; a radiator is arranged on the outer surface of the wire conduit. With the adoption of the spray-head structure, the temperature transferred from the nozzle to the wire conduit can be greatly decreased, so that the probability of melting thermoplastic materials can be reduced, and as a result, the fault in the wire conduit can be greatly reduced.

The invention discloses a self-adaptive guiding device and a transcatheter treatment system.The self-adaptive guiding device comprises a hollow flexible catheter with a certain length, the flexible catheter is pre-shaped and bent towards different planes for at least five times along the central axis of the flexible catheter in the natural state, and the flexible catheter is bent towards the different planes along the central axis of the flexible catheter; the included angle between the two planes which are bent at a time and are closest to the far end is larger than 90 degrees, and the angle between the planes which are continuously bent at least four times is smaller than 90 degrees, so that at least part of the flexible tube body adapts to the shape of the aortic arch part. According to the self-adaptive guiding device and the transcatheter treatment system provided by the invention, the self-adaptability of the guiding device to blood vessels with complex anatomic forms such as the aortic arch part can be improved, the structure of the guiding device is simplified, and the use safety of instruments is improved; the situation that the guiding device needs a large avoiding space during use is avoided, tissue is prevented from entering an avoiding area in a filling mode, and it is ensured that the guiding device has a large operation adjusting space and an initial position which is more beneficial to adjustment.

The invention provides a granulating machine with small stress of parts such as a ring die, stable load, long service life, low energy consumption, high yield and high production efficiency. The granulating machine comprises a machine base; two engaged gear ring dies are rotatably arranged on gear ring die shafts; one of the two gear ring die shafts is a fixed shaft, and the other one of the two gear ring die shafts is a floating shaft; the fixed shaft is fixed on the machine base; the floating shaft capable of moving relative to the fixed shaft in the radial direction is arranged on the machine base; an elastic component is arranged between the machine base and the floating shaft; a power mechanism for driving one gear ring die to rotate is arranged on the machine base; a die hole extending along a radial direction is formed in the each gear ring die; an inlet and an outlet of the die hole are formed in an outer ring and an inner ring of each gear ring die; a feeding channel is formedin the machine base; an outlet of the feeding channel is positioned on an engaged part of the outer rings of the two gear ring dies; and materials which enter from the feeding channel are pressed into the die hole by the two engaged gear ring dies from the die hole inlet and form material rods to come out of the die hole.

A die assembly tool (P1) is constructed such that an extrusion molding die (10) is placed in a die installation hole (61) of a die installation plate (60) and that a metal material introducing into the die installation hole (61) is introduced from a port hole (24) formed in a metal material pressure receiving surface (22) of the die (10). A material containing section (70) reaching the downstream side, in the extrusion direction, of the inlet position of the port hole (24) is provided outside the port hole (24).The assembly tool (P1) is adapted such that a portion (75) of the metal material introduced into the die installation hole (61) is contained in the material containing section (70).

The invention discloses a refractory ceramic plunger machine. The refractory ceramic plunger machine structurally comprises a support foot, a supporting frame, a plunger device and a driver, wherein the right end of the support foot is connected with the lower end of the supporting frame through bolts, and the driver is connected with the upper end of the plunger device through a shaft. The rotation of a rotating ring can scrape and clean the ceramic mud on the inner wall of an extrusion port, a large amount of porcelain clay is prevented from adhering on the surface of the outer side of the extrusion port, after using, it is necessary to reach into the interior for cleaning so as to prevent the situation that it is difficult to clean the ceramic mud on the surface of the inner wall of theextrusion port due to air drying, thus a certain dangerousness exists, a supporting block in a ring body drives a connecting piece to rotate to close to the surface of the inner wall of the extrusionport to rotate to generate vibration, dried ceramic mud is conveniently vibrated to reduce the adhesion force with the inner wall of the extrusion port, finally, the dried ceramic mud is shaken off,and the situation that the dried ceramic mud has certain strength, under the condition of unclear cleaning, the extrusion port can be broken by extruding again, the extrusion resistance is reduced, and the extruded ceramic mud is unqualified is prevented.