51results about How to "Shorter injection molding cycle times" patented technology

The invention has an object to provide a catalyst for polymerizing or copolymerizing an α-olefin, catalyst constituent thereof, and method of polymerizing α-olefins with the catalyst, for production of α-olefin polymers or copolymers with high hydrogen response, high polymarization reaction rate, high stereoregularity and excellent melt fluidity. The invention discloses a catalyst constituent of the catalyst for polymerizing or copolymerizing an α-olefin, represented by Formula 37 or 38: Si(OR1)3(NR2R3)  Formula 37 (where in Formula 37, R1 is a hydrocarbon group with 1 to 6 carbon atoms; R2 is a hydrocarbon group with 1 to 12 carbon atoms or hydrogen; and R3 is a hydrocarbon group with 1 to 12 carbon atoms) RNSi(OR1)3  Formula 38 (where in Formula 38, R1 is a hydrocarbon group with 1 to 6 carbon atoms; and RN is a cyclicl amino group).

A modularized cold runner system relates to an injection molding die of a colder runner. The system can effectively isolate heat exchange between a high-temperature mold cavity and a low-temperature cold runner system, maintain heat balance of the whole modularized cold runner system, always keep low-temperature flow, prevent materials from being heated and vulcanized in the flow channel, and achieve molding for products without the runner. The system is good in controllability and versatility. The system is provided with, from top to bottom, a stationary mold base plate, a sprue bush, a cylinder installing plate, a cylinder, a cold runner plate, a heat isolation plate, a heating plate, a fluid modulation apparatus, a conicity locating piece, pressure blocks, a water-cooled needle-valve nozzle and a quickly-changed clamp, wherein the stationary mold base plate, the cylinder installing plate, the cold runner plate, the heat isolation plate and the heating plate are sequentially arranged from top to down and fixedly connected through fasteners.

The invention provides an automatic-ejecting-out injection mold for a dust guard. The automatic-ejecting-out injection mold for the dust guard comprises a mold core assembly, a half block, an upper mold plate, a lower mold plate, an upper mold fixing plate and an ejecting-out assembly. The mold core assembly comprises an upper mold core, a lower mold core and a movable middle mold core, wherein the upper mold core is installed on the upper mold plate which is installed on the upper mold fixing plate, the lower mold core is installed on the lower mold plate, and the movable middle mold core is arranged in the lower mold core. The half block which is arranged around the mold core assembly and matched with the mold core assembly is arranged on the periphery of the mold core assembly, a cavity is formed by the gap between the mold core assembly and the half block, and the upper mold core is provided with a rubber injection hole communicating with the cavity. The ejecting-out assembly comprises an inner ejecting-out mold core, an ejector pin panel and an ejector pin bottom plate, wherein the inner ejecting-out mold core is arranged in the movable middle mold core; the top end of the inner ejecting-out mold core abuts against the upper mold core; the ejector pin panel is located under the lower mold pate; the bottom end of the inner ejecting-out mold core is connected with the ejector pin panel; and the ejector pin panel is installed on the ejector pin bottom plate. The automatic-ejecting-out injection mold for the dust guard can realize automatic production, prolong the service life, and shorten the injection molding period for products.

The invention relates to the technical field of metal terminal embedded type injection molding of a connector of an electronic product, in particular to a small terminal and feed belt integrally embedded type injection mould. The mould is characterized in that the small metal terminal and a feed belt are put into a male mould of the injection mould; and a product is formed through the injection molding of a matched mould of a female mould of the injection mould. The injection mould mainly solves the problems that in the small terminal and feed belt embedded type injection mould, the small terminal has long placement time to cause longer injection molding cycle; therefore, the technical problems of low product production capacity and high manufacturing cost are overcome; and the small terminal and feed belt integrally embedded type injection mould has strong universality and reliable performance.

The invention discloses a demolding device of an injection mold of thread products and the injection mold. The demolding device of the injection mold of thread products comprises a rack, a drive gear group, a drive shaft and a reversing gear group, wherein the rack is arranged on the injection mold; the drive gear group comprises at least two drive gears which are meshed sequentially, and one drive gear is meshed with the rack; the drive shaft is connected with and liked with the other drive gear in the drive gear group; the reversing gear group comprises at least two reversing gears which are sequentially meshed, wherein one reversing gear is connected with and linked with the drive shaft, and the other reversing gear is connected with and linked with the drive shaft of the injection mold. The demolding device is compact in structure, is convenient to operate, operates stably, is high in production efficiency, and has production advantage and economic benefit compared with a traditional common motor, the hydraulic control and servo motor control.

The invention provides a high crystallization rate polyamide with a crystallization peak half-peak width Delta T1 / 2 of 6-12DEG C. The high crystallization rate polyamide is composed of a repeat unit formed by dicarboxylic acid and diamine. The high crystallization rate polyamide is composed of a repeat unit derived from the following: (a) aromatic diacid and aliphatic diacid; (b) 1, 10-diaminodecane and aliphatic diamine with a carbon atom number of 2-13 except 1, 10-decanediamine; wherein, the aromatic diacid accounts for 70-100mol% of (a), and 1, 10-decanediamine accounts for 70-100mol% of (b). The high crystallization rate polyamide provided by the invention has high crystallization rate, shortens the injection molding period of the material, and improves the production efficiency. Theinvention also provides a preparation method of the polyamide, the method has the characteristics of simple operation, cheap and easily available raw materials, and is suitable for large-scale production. Nucleating agent and other additives capable of improving the polyamide crystallization rate are not added, and the influence on the basic properties of polyamide is little.

The invention discloses an ultrasonic vibration-assisted injection molding method and device and relates to the field of injection molding. The device comprises a forming mechanism, an injection mechanism and an ultrasonic vibration mechanism. The ultrasonic vibration mechanism is arranged between a plunger and a hydraulic device, an amplitude-change pole amplifies an ultrasonic vibration amplitude and transfers the same to the plunger, the plunger then transfers vibration to a melt, and injection molding in different conditions is met by changing the frequency, amplitude and vibrating mode ofultrasonic vibration. The method and device are wide in applicability, improve the quality of a plastic part, improve the flowing rate of a melted plastic in a charging barrel, a nozzle and a cavity,reduce the injection time, shorten the injection molding period and improve the percent of pass of the plastic part.

The invention relates to a hydrotalcite-containing stiffening nucleating agent composition and also relates to a thermoplastic plastic containing the nucleating agent composition and particularly relates to nylon containing the nucleating agent composition. The nucleating agent composition contains di-[4-tert-butyl benzoic acid]hydroxyl aluminium in a weight ratio of (5:1)-(1:5). The nucleating agent composition has a better nucleating effect, and the obtained nylon product has high tensile and bending strength, low loss of impact strength, good heat resistance and the like. By adopting the nucleating agent provided by the invention, the demoulding property in the nylon processing process is improved, the injection moulding cycle is shortened, and the production efficiency is improved; and moreover, the dimensional stability of the product is higher, the shrinkage is reduced, and the mechanical properties, product transparency and heat-resistance temperature of the product are improved.

The invention relates to an automobile tailgate material and a preparation method thereof, in particular to an automobile all-plastic tailgate outer panel material and a preparation method thereof. The material of the present invention comprises the following components in parts by weight: 50-70 parts of polypropylene, 10-40 parts of reinforcement, 3-15 parts of toughening agent, 0.2-1 part of bridging agent, and 3-10 parts of compatibilizer , 0.2-0.5 parts of nucleating agent, 0.3-1 part of antioxidant, and 0.3-1 part of lubricant. The invention adopts low specific gravity and high strength organic fiber as polypropylene molecular chain motion inhibitor, limits the thermal expansion of polypropylene material, prepares high strength polypropylene material with low linear thermal expansion coefficient, and meets the requirements of automobile all-plastic tailgate material. At the same time, the weight of the car has been realized. In addition, the present invention has the characteristics of high flow, no floating fibers, high appearance, easy spraying, low warpage and rapid prototyping, which reduces the assembly and manufacturing costs of parts; it also has the characteristics of low odor and low VOC, which can effectively improve the interior air quality.

Syndiotactic polypropylene blends having a unique set of mechanical properties may be prepared by blending syndiotactic polypropylene with a high molecular weight mineral oil, an ultra low density polyethylene, or both. The syndiotactic polypropylene blends of the present invention have been found to have reduced flexural modulus, reduced haze, improved impact strength and shorter injection molding cycle times. It has been determined that the addition of about 5 to about 10 percent high molecular weight mineral oil to a syndiotactic polypropylene can decrease flexural modulus values by about 25 to about 30 percent. Moreover, the addition of up to about 10 percent mineral oil to the syndiotactic polypropylene material does not show signs of bleeding or impair clarity, in fact, percent haze values are slightly improved with the addition of mineral oil. Additionally, injection molding cycle time optimization shows an improvement of about 12 seconds in overall cycle time utilizing a syndiotactic polypropylene blend with 5% mineral oil in comparison to a syndiotactic polypropylene without mineral oil. The syndiotactic polypropylene blends according to the present invention may be further processed according to accepted practices to make cast films, blown films, injection molded parts, blow molded containers, and other articles using basic plastics fabrication techniques as known in the art.

The invention discloses a manufacturing method of a shell of a motor stator. The method comprises the steps of: a, overlying and fixing a plurality of silicon steel sheets as a silicon steel sheet assembly; b, carrying out injection moulding on the silicon steel sheets with plastic to form a silicon polar framework of the motor stator, wherein the silicon polar framework of the motor stator comprises a plastic circular framework and a plurality of silicon steel sheet assemblies, the plastic circular framework is an integral framework or formed by two or more than two arc-shaped frameworks, and the silicon steel sheet assemblies are arranged circumferentially along the plastic circular framework; each silicon steel sheet assembly is fixedly connected with the plastic circular framework, a plastic separation fence of the plastic circular framework is arranged between the adjacent silicon steel sheet assemblies, and the outer side of each silicon steel sheet assembly is at least partially exposed to the circumferential wall of the plastic circular framework; and c, placing the silicon framework of the motor stator into a shell module of the motor stator, and then carrying out injection moulding with the plastic to form the integral shell of the motor stator. According to the manufacturing method of the shell of the motor stator provided by the invention, the silicon steel sheet assemblies are accurately positioned, and the production cost is low.

The invention discloses a non-return ring free multiaxial volume pulse injection forming method and device. In the method, eccentricity exists between at least two mutually engaged eccentric rotors arranged in a material barrel, spiral sections as well as straight sections and the axial direction. When the eccentric rotors rotate, periodical change occurs to the radial distance between the two adjacent eccentric rotors, periodical change occurs to the volume of the closed space formed among the outer surfaces of the eccentric rotors, an inner hole of the material barrel and the eccentric straight sections, to-be-injected materials flow into the adjacent eccentric spiral sections through the eccentric straight sections, and complete positive displacement conveying is conducted on the materials. In the device, the at least two mutually engaged and counter-rotating eccentric rotors are arranged in the material barrel. The at least two eccentric rotors are both provided with the spiral sections and the straight sections at intervals. The center lines of the spiral sections as well as the straight sections and the rotary axis are eccentric. The eccentric directions of the adjacent eccentric rotors are opposite. According to the non-return ring free multiaxial volume pulse injection forming method and device, vibration energy wasted by a non-return ring is avoided, and the influence of the pressure of pulse change on the mold filling and pressure maintaining process is enhanced.

The invention discloses an external induction heating device of a vertical injection mold, and belongs to the technical field of injection molding. The external induction heating device comprises an injection molding device, a clamping device and a high-frequency heating device. Local heating is performed on the surface of a mold core by the aid of a skin effect in an induction heating mode. The external induction heating device is novel in structure, ingenious in design, high in heating and cooling efficiency, short in working period, convenient to control and adjust, high in adaptability, capable of saving manufacturing and machining costs and remarkable in effect.

A modularized cold runner system relates to an injection molding die of a colder runner. The system can effectively isolate heat exchange between a high-temperature mold cavity and a low-temperature cold runner system, maintain heat balance of the whole modularized cold runner system, always keep low-temperature flow, prevent materials from being heated and vulcanized in the flow channel, and achieve molding for products without the runner. The system is good in controllability and versatility. The system is provided with, from top to bottom, a stationary mold base plate, a sprue bush, a cylinder installing plate, a cylinder, a cold runner plate, a heat isolation plate, a heating plate, a fluid modulation apparatus, a conicity locating piece, pressure blocks, a water-cooled needle-valve nozzle and a quickly-changed clamp, wherein the stationary mold base plate, the cylinder installing plate, the cold runner plate, the heat isolation plate and the heating plate are sequentially arranged from top to down and fixedly connected through fasteners.

The invention provides a secondary buckling part molding angle-ejection device and an injection mold and relates to the technical field of injection molds. The secondary buckling part molding angle-ejection device comprises an angle ejection head, an angle ejection rod and a buckling part molding insert pin. The angle ejection rod is connected with the bottom of the angle ejection head. The frontof the angle ejection head is provided with a molding groove, and the back of the angle ejection head is provided with an insert pin jack, which penetrates through the angle ejection head and is communicated with the molding groove. The buckling part molding insert pin is detachably arranged at one side of the angle ejection head, far from the molding groove. An end portion of the buckling part molding insert pin is inserted into the insert pin jack from the back of the angle ejection head and extends into the molding groove. According to the secondary buckling part molding angle-ejection device, through the integrated structure, the buckling part and the buckling groove can be molded at a time, thereby reducing processing and material costs. Meanwhile, there is no need to separately drivedifferent molding mechanisms, the injection moulding period is shortened, and abnormity of combining different mechanical parts is avoided.

The invention discloses a nylon nucleating agent and its preparation method and use. The nylon nucleating agent is prepared from a cyclohexyl isocyanate or a phenyl isocyanate and a cyclohexyl alcohol, a cyclohexyl phenol, a cyclohexyl acid, a cyclohexyl amine compound, a phenyl alcohol, a phenyl phenol, a phenyl acid or a phenyl amine compound through condensation addition. The nylon nucleating agent has the advantages of simple processes, short reaction period and high yield. In nylon resin extrusion injection molding, when the nylon nucleating agent of which a use amount is 0.2 to 0.5% by mass of that of nylon resin is added, good nucleating effects are obtained. In addition, the nylon nucleating agent can be combined with an auxiliary nucleating agent having nucleation effects. Through utilization of the nylon nucleating agent, nylon resin demolding performances are improved; an injection molding period is shortened; production efficiency is improved; product size stability is improved; a shrinkage rate is reduced; product mechanical properties are improved; and a heat resistance temperature is improved. Compared with the existing nylon nucleating agents, based on application effects, the nylon nucleating agent provided by the invention has a large competitive advantage and an industrial application prospect.

The invention discloses a high-performance PET (Polyethylene Terephthalate) composite material capable of being applied to medium and low mold temperature rapid crystallization molding and a preparation method of the PET composite material and relates to the technical field of high polymers. According to the technical scheme, the PET composite material is formed by the following components in percentage by weight: 40-55% of PET, 0.2-1% of a coupling agent, 1-8% of a flexibilizer, 0.3-5% of a compound nucleating agent, 9-15% of a compound flame retardant, 0.2-0.6% of an antioxidant, 0.5-1.5% ofother additives and 20-45% of alkali-free glass fiber yarns. Compared with the traditional PET material, the high-performance PET composite material prepared by the invention has the advantages thatthe injection molding cycle of the PET material is greatly shortened, and the material has excellent mechanical property and excellent toughness and heat resistance and can meet novel market requirements.

The invention relates to the field of injection molding equipment, in particular to automatic taking out and burying equipment for special-shaped part injection molding. The automatic taking out and burying equipment for special-shaped part injection molding comprises a middle rotary table, an injection molding machine, a top beam frame arranged above the injection molding machine, a turnover mechanism, a lifting mechanism and a first servo electric cylinder arranged at the top of the top beam frame, wherein the middle rotary table is arranged at the periphery of the injection molding machine;a sliding beam matched with the top beam frame at a right angle is arranged on the top beam frame; the sliding beam can move back and forth between the injection molding machine and the middle rotarytable through the first servo electric cylinder; the lifting mechanism is movably arranged at the other end of the sliding beam through a second servo electric cylinder; the turnover mechanism is arranged on the output end of the lifting mechanism; the output end of the turnover mechanism is provided with a support beam; two sides of the support beam are respectively provided with a material taking plate and a buried plate, the material taking plate is movably matched with a support beam through a cylinder sliding table; and the bottoms of the material taking plate and the buried plate are respectively provided with a plurality of clamps and material suction clamps. According to the automatic taking out and burying equipment for special-shaped part injection molding, the safety risk caused by manual part taking and burying is avoided, and the production efficiency is improved.

The invention relates to an injection mould core cooling device. The injection mould core cooling device comprises a slender-type core, a ladder blind hole, a drainage column, a through hole, a waterinlet, a water outlet, a water inflow hole, a water outflow hole, a water inflow pipe, a locating pin, a seal ring and a disassembly and assembly threaded hole; the ladder blind hole coaxially placedis formed in the bottom of the core; the drainage column is arranged at the opened end of the ladder blind hole and is located through a hole shoulder; the through hole vertically placed is formed inthe surface of the drainage column; the water inlet and the water outlet are correspondingly formed in the surface of the core and are correspondingly placed at the two ends of the through hole; the water inflow hole and the water outflow hole are correspondingly formed in the inner end of the drainage column and are intersected with the through hole; the water inflow pipe is arranged in the ladder blind hole; one end of the water inflow pipe is arranged in the water inflow hole; one end of the locating pin is arranged on the drainage column; the other end of the locating pin is arranged in the core; the seal ring is arranged on the surface of the drainage column and is located between the through hole and the locating pin; the disassembly and assembly threaded hole is formed in the outerend of the drainage column; and a gap which corresponds to the cross section of the through hole and is placed towards the direction of the water inlet is formed in the water inflow pipe. The injection moulding cycle can be shortened, the quality of products is improved, and the injection mould core cooling device is simple in structure, small in size, convenient to machine and convenient in disassembly and assembly.

The invention discloses a production device for an automobile large injection molding part. The production device comprises a material conveying device, an injection molding device and a cooling device, wherein the material conveying device comprises a workbench, a material storage box, a material suction machine, a second supporting frame and a second conveying pipe, the injection molding deviceis arranged on the left side of the workbench, the injection molding device comprises an injection molding machine, a drying machine, a motor, a first supporting frame, a rotating rod and a mold, andthe cooling device is arranged on the left side of the injection molding device; and the cooling device comprises a water storage tank, a booster pump, a first conveying pipe and a spray head. The quality risks of weld marks and buckling deformation caused by abnormal mold temperature in the production process are greatly reduced, the quality stability of long-term production is guaranteed, the reject ratio is reduced, unnecessary invalid waiting time is shortened, further, the injection molding cycle is shortened, meanwhile, a manipulator is adopted for taking the product, thus the productioncycle is further shortened, and production efficiency is improved.

The invention discloses an injection mold for a router base and an injection process of the router base. The injection mold comprises a panel, a striper plate, a female module, a male module and a bottom plate, wherein the striper plate is positioned between the panel and the female module; two pins are arranged at the bottom plate; the male module is fixed at the pins; the panel is provided witha sprue bush; a sprue runner is arranged inside the sprue bush, and comprises an inlet runner, a mixing cavity and an outlet runner; glue inlet runners are communicated with the mixing cavity; the mixing cavity is communicated with the outlet runner; fluid inlets of a plurality of glue inlet runners are formed in the upper end face of the sprue bush; and the glue inlet runners are symmetrically arranged in a pairwise manner. According to the cooling runner having a zigzag structure, the cooling efficiency is improved, the whole injection molding cycle is reduced, the fluids can be mixed more uniformly, binding lines formed on a product among different fluids can be avoided, and the injection product quality and surface appearance of an injection product can be ensured.

The invention discloses a multifunctional jig for metal implanting and product withdrawal. The multifunctional jig comprises a positioning jig and a capturing jig, wherein the capturing jig comprisesa product absorption mechanism and a metal sheet implanting mechanism. Through matched using of the positioning jig and the capturing jig, three main steps of capturing a to-be-processed metal piece,withdrawing a formed product from a high-temperature mould and burying the to-be-processed metal piece into the high-temperature mould is rapidly completed. The multifunctional jig is implemented viathe specific working processes of: manually putting the to-be-processed metal piece into the positioning jig, absorbing the to-be-processed metal piece from the positioning jig by the capturing jig, enabling the capturing jig to approach to the high-temperature mould, after the high-temperature mould is opened, absorbing the formed product from the mould by the capturing jig; and putting the to-be-processed metal piece into the high-temperature mould by the capturing jig. The capturing jig is connected with an automatic manipulator, and the positioning jig is put at a place far away from the high-temperature mould, so that the process of withdrawing products and putting metal pieces can be replaced, operation is carried out automatically, and then operation is safe, reliable, efficient andaccurate.

The invention discloses a universal slide shoveling machine structure. The universal slide shoveling machine structure comprises a slide base and a shoveling machine. The slide base is arranged on anarc guide rail on the fixed mold side of a mold slidably, the shoveling machine is fixed to the movable mold side of the mold, and when the shoveling machine does mold opening or mold closing movementin the vertical direction along with the movable mold side of the mold, a universal sliding rail is in spiral sliding fit with a universal sliding groove to drive the slide base to slide on the arc guide rail. The universal slide shoveling machine structure has the beneficial effects that structures such as an oil cylinder, a rack and a gear are omitted, the manufacturing and using cost of the mold is reduced, the operation safety and stability of the mold are improved, and the failure rate is reduced. Moreover, the universal slide shoveling machine is simple and compact in overall structureand convenient to assemble, and the overall size of the mold cannot be increased. Besides, the universal slide shoveling machine structure realizes that the core-pulling and mold-closing actions of the slide base can be synchronously finished with the mold-opening and mold-closing actions of the mold, so that the injection molding period is shortened, and the production efficiency is improved.

The present invention provides a polyamide having a high crystallization rate. A crystalline peak width at half maximum ΔT1 / 2 of the polyamide is 6-12ºC. The polyamide having the high crystallization rate is composed of a repeating unit formed by dicarboxylic acid and diamine. The polyamide is composed of the following repeating unit derived from the following: (a) aromatic diacid and aliphatic diacid; and (b) 1,10-diaminodecane and aliphatic diamine having the number of carbon atoms of 2-13 in addition to 1,10-diaminodecane, the aromatic diacid being 70-100 mol% of (a); 1,10-diaminodecane being 70-100 mol% of (b). The polyamide having a high crystallization rate in the present invention has a high crystallization rate, shortens the injection molding period of a material, and improves the production efficiency. The present invention also provides a preparation method for the polyamide. The method has simple operations and raw materials which are cheap and easily obtained, and is suitable for large-scale production. No additives such as a nucleating agent for improving the crystalline rate of the polyamide are added, thus having few influences on the basic property of the polyamide.

The invention discloses a structure of a universal row shovel, comprising: a row seat and a shovel. The row seat is slidingly set on the arc guide rail on the fixed side of the mold, and the shovel is fixed on the moving side of the mold. The rail drives the row seat to slide on the arc guide rail through the helical sliding cooperation with the universal chute. Beneficial effects of the present invention: the structure of the universal row shovel omits structures such as oil cylinders, racks and gears, reduces the manufacturing and use costs of the mold, improves the safety and stability of the mold operation, and reduces failures Rate. Moreover, the overall structure of the universal row shovel is simple and compact, and the assembly is convenient, without increasing the overall size of the mold. In addition, the universal row shovel structure realizes that the core pulling and mold closing actions of the row seat can be completed synchronously with the mold opening and closing actions of the mold, which shortens the injection molding cycle and improves production efficiency.

An external induction heating device for a vertical injection mold belongs to the technical field of injection molding, and includes an injection molding device, a clamping device and a high-frequency heating device. The invention has the advantages of novel structure, ingenious design, high heating and cooling efficiency, short working cycle, convenient control and adjustment, strong adaptability, saving manufacturing and processing costs, and remarkable effect.

The invention relates to a rapidly-formed halogen-free flame-retardant PA6 composite material and a preparation method thereof. The rapidly-formed halogen-free flame-retardant PA6 composite material comprises the following raw materials in percentage by mass: 65-80% of PA6 resin; 15-25% of a phosphorus-nitrogen composite flame retardant; 3-5% of a synergistic flame retardant; 0.5-2% of a nucleating agent; 0.5 to 1% of an antioxidant; and 1-2% of a lubricant. The prepared rapid prototyping halogen-free flame-retardant PA6 composite material does not contain halogen, meets the green and environment-friendly requirements, has the characteristics of rapid prototyping, shortening of the injection molding period and the like, is especially suitable for injection molding of thin-wall plastic products, effectively shortens the molding period during injection molding of the material, and improves the production efficiency. Meanwhile, the physical property and the flame retardant property of the material are kept.