36results about How to "Improve injection precision" patented technology

The invention relates to a content detection method for lysine of a compound ketoacid tablet, which comprises the following steps: preparing an o-phthalaldehyde reaction liquid (OPA reagent) with the concentration of 10 mg/ml, wherein 2-3 percent (v/v) of 3-thiohydracrylic acid is contained; afterwards, mixing lysine and the reaction liquid at ratio of 1:1(v/v) in a borate buffer system with a pH valve of 10.2 plus or minus 0.1 through an automatic pre-column derivation method, and then carrying out ambient temperature reaction; and finally, adopting a high performance liquid chromatography to measure the content of the lysine at 338 nm. The method provided by the invention can effectively solve the problem that bimodality of the lysine occurs in the current OPA pre-column derivation method, improves the sample introduction precision of the lysine in the detection through the automatic pre-column derivation method, greatly shortens the detection time, and is particularly suitable for detecting the content of the lysine of amino acid samples in a laboratory.

The invention relates to the field of injection molding machines, in particular to a double-step precision injection molding device. The invention discloses the double-step precision injection molding device with the following structure, the device comprises a pre-injection storing mechanism, an injection mechanism, a hydraulic system and a spray nozzle, wherein the pre-injection storing mechanism comprises a front premolding material barrel, a premolding material barrel, a screw rod, a feeding seat and a hydraulic motor, and the hydraulic motor is used for driving the screw rod to rotate; the injection mechanism comprises a front material barrel, a material barrel, an injection seat, a plunger rod and an injection electro-hydraulic system; a double-acting cylinder is arranged between a thrust bearing and a sealed groove, and movements of the pre-injection storing mechanism, the injection mechanism and the spray nozzle are coordinated and controlled by the hydraulic system. The double-step precision injection molding device has the advantages that the flow channel is short, the stagnation of materials is avoided, and the injection precision is high.

The invention discloses an injection mold for an automobile steering lamp seat, which comprises a mold base, a male mold base, a male mold core, a female mold base, a female mold core and an ejection mechanism; four slides are arranged between the male mold core and the female mold core Block cavity; four slider cavities are respectively provided with a front slider assembly, a rear slider assembly, a left slider assembly and a right slider assembly; four inclined top cavities are also arranged in the male die core; the inclined top The center line of the cavity forms an angle of 83° with the bottom surface of the male mold core; the inclined roof is detachably installed in the inclined roof cavity; form a mold cavity between them; the injection mold of the present invention solves the problem of high local precision requirements of the product by inlaying the inclined top in the male mold core, and the inclined top is easy to disassemble. The cavity of the injection mold is formed by the enclosing of the mother mold, which has a high precision of the mold cavity and a high qualification rate of the injection molded product.

The invention discloses a double-R supporting structure of an injection molding machine. The double-R supporting structure comprises a base, two linear guide rails, a plurality of sliding blocks, a movable die plate, a fixed die plate, a die and four tie bars. One end of each tie bar is positioned on the fixed die plate, and the other end of each tie bar penetrates the movable die plate; the movable die plate can move on the tie bars, and the die is mounted between the movable die plate and the fixed die plate; the linear guide rails are fixed to the base, and the sliding blocks are positioned on the linear guide rails in a sliding manner; the two sides of the movable die plate are symmetric, and are each fixedly provided with a reverse-R-shaped supporting block; the two sides of the fixed die plate are symmetrically and fixedly provided with a positive-R-shaped supporting block; the bottoms of the reverse-R-shaped supporting blocks are fixed to the sliding blocks, and the sliding blocks are connected with the linear guide rails and can side on the guide rails; the bottoms of the positive-R-shaped supporting blocks are fixed to the base; and the double-R supporting structure of the injection molding machine can effectively prevent stress deformation of the fixed die plate and the movable die plate, the injection precision is improved, the production efficiency is improved, and the service life is prolonged.

The invention provides a rotary blanking injection mold for a terminal cover. A spherical rotating device is arranged between the lower molds, and the lower mold is rotated vertically and horizontally through the rotating device, and a blanking track is arranged at the right end of the base. The product is injection molded through the upper mold and the lower mold, and the lower mold is driven to rotate through the rotating device, which is convenient for unloading with the unloading track, and the position detection device and the receiving device are installed to improve the injection molding accuracy. The position of the rotating device is adjusted by the adjustment device. Make adjustments to adapt to products of different specifications, set up feeding devices and contact sensors, and improve feeding efficiency.

The invention belongs to the technical field of injection molding machines, and particularly relates to a high-speed low-inertia structure applied to an injection molding machine and the injection molding machine with the high-speed low-inertia structure. The high-speed low-inertia structure applied to the injection molding machine and the injection molding machine with the high-speed low-inertia structure are provided for solving the problem that in the prior art, large moving inertia is generated during high-speed injection, the high-speed low-inertia structure comprises a base, wherein a front plate and a rear plate are fixedly arranged on the base, an injection molding barrel is connected to the front plate, a moving assembly is arranged between the front plate and the rear plate, a charging barrel screw rod is connected to the moving assembly, the end, far away from the moving assembly, of the charging barrel screw rod extends into the injection molding material barrel, the injection molding machine further comprises a charging opening communicated with the interior of the injection molding material barrel, and the charging opening is formed in the injection molding material barrel or the front plate. The charging barrel screw is connected to the moving assembly capable of independently moving, and the rear plate is fixedly arranged to ensure that the rear plate cannot move along with the charging barrel screw during injection, so that the moving inertia is reduced, the service life of the injection molding machine is prolonged, and the injection molding precision of the injection molding machine is improved.

The invention discloses an endoscope rear end structure which comprises a shell, a shell mounting groove is formed in the rear end surface of the shell; an objective lens assembly is mounted in the shell mounting groove; the objective lens assembly comprises an objective lens assembly and an objective lens mounting base matched with the shell mounting groove; the objective lens mounting base is fixed in the shell mounting groove; the objective lens assembly is installed in the objective lens mounting base and is in sliding connection with the objective lens mounting base, the objective lens assembly comprises a first objective lens, an objective lens base and a second objective lens, the first objective lens and the second objective lens are fixed to the two ends of the objective lens baserespectively and located on the same straight line, and an ocular lens is fixed to the rear end of the objective lens mounting base and the ocular lens and the objective lens are located on the samestraight line. The endoscope rear end structure has the beneficial effects that the original rear end fixing structure is subjected to injection molding and integrated molding, and meanwhile, the objective lens system is integrally designed so that the endoscope is more convenient and faster to assemble and debug, and the imaging quality of the ocular lens is obviously improved; and the gluing surface of the objective lens system is increased so that the packaging quality is remarkably improved.

The invention discloses an optimization method for improving the injection molding precision of an optical element, which provides an injection molding process considering melt materials and mold core surface roughness on the premise that injection molding process parameters and the like are all optimal, selects different mold core surface roughness intervals according to different melt materials, and predicts the injection molding precision of the optical element on the basis of an existing ultra-precision machining quality prediction model. Compared with the extremely high quality requirement for the surface of the mold core in a traditional method, the optimization method for improving the injection molding precision of the optical element improves the molding precision of the optical element and reduces the surface roughness of the optical element on the basis of improving the machining efficiency of the mold core; and optimization of a micro injection molding process of the optical element and improvement of the optical performance of the element are facilitated.

The invention discloses a waistband buckle manufacturing method and a waistband buckle manufactured by the manufacturing method. The method comprises the steps that according to the preset product shape, a metal plate is adopted for stamping to form a framework, and the framework is put into an in-mold injection mold to be subjected to injection molding to form a front buckle used for fixing and tying a waistband body; according to the preset product shape, metal plates are adopted for punching to form accessories, and the accessories are assembled to obtain a rear buckle used for connecting the front buckle and the waistband body; and the front buckle and the rear buckle are connected into a whole to form the waistband buckle. The front buckle is manufactured by adopting an in-mold injection molding process, a metal stamping part is used as the framework, the strength is good, the weight is proper, the injection molding precision is high, the molding capacity is good, a product obtained after injection molding does not need grinding, polishing and other procedures, and the product is attractive and exquisite in appearance molding and flat, smooth, tidy and uniform in surface; andthe rear buckle is formed by stamping the metal plate, so that the product is clear in corner angle after being formed, the curved surface modeling is clean and neat, the grinding and polishing procedures are not needed, the product taste is improved, and the manufacturing cost is reduced.

The invention discloses polycarbonate engineering plastic with electromagnetic shielding and heat conduction functions and a preparation method thereof. The polycarbonate engineering plastic comprisesthe following components in parts by weight: 50-90 parts of polycarbonate resin, 0.5-2 parts of antioxidant, 0.2-1 part of light stabilizer, 0.2-2 parts of lubricant, 0.5-5 parts of flame retardant,2-20 parts of reinforcing filler, and 5-30 parts of a compound electric conduction and heat conduction filler; wherein the compound electricity conduction and heat conduction filler is obtained by compounding 2-20 parts of electricity-conducting filler and 2-20 parts of heat-conducting filler, the electricity conduction filler is selected from one of fibrous carbon powder, expanded graphite, graphene, carbon nanotubes and chopped stainless steel fibers, and the heat-conducting filler is selected from one of boron nitride, aluminum nitride, aluminum oxide and silicon carbide. The polycarbonateengineering plastic disclosed by the invention has electromagnetic shielding and heat conducting functions, can be applied to electronic equipment, saves material consumption and volume occupation, and enables electronic products to be economical and attractive.

The invention relates to the field of dies, in particular to a machining mold device. According to the machining mold device, an injection mold body can be rapidly replaced, the injection mold body can rapidly slide into/out of a mounting interval through a slide way mechanism arranged on a mold assembly, the mold replacement time is greatly shortened, the production efficiency is improved, only the injection mold body needs to be replaced without replacing the whole set of mold assembly, the mold replacement cost is greatly saved, the production cost is reduced, meanwhile, the injection mold body can be locked and fixed in the mounting interval through a locking mechanism, the injection mold body is effectively prevented from moving relatively, operation is easy, production is safe and stable, rapid mold replacement is achieved, and the injection molding precision is higher.

The invention provides a double-layer sliding type terminal cover injection mold which comprises a left mold body and a right mold body. Injection openings are formed in the right mold body. A forming cavity is formed in the left mold body. A blocking plate is arranged at the right end of the forming cavity. Feeding holes are formed in the blocking plate. A moving block moving vertically is arranged at the left end of the forming cavity, and the moving block drives the forming cavity to vertically move. The number of the feeding holes is two, and a cooling device is arranged at the right end of the forming cavity. Injection molding is conducted on a terminal cover through the forming cavity in the left mold body, the moving block is used for driving the forming cavity to vertically move, and the cooling device is used for cooling a last position of the forming cavity, so that the phenomenon that the mold is excessively hot, and consequently equipment is damaged is avoided, and the service life of the equipment is prolonged; and in addition, position detection devices are arranged for detecting the position of the moving block, and therefore the injection molding precision is improved.

The invention discloses a relay base structure capable of realizing positioning stability and good consistency during secondary injection molding. The relay base structure includes a coil rack and two copper leading-out sheets which are formed on one end of the coil rack during primary injection molding and serve as coil leading-out pins, and the other end of the coil rack is not provided with copper leading-out sheets, but the other end of a coil component is provided with a positioning part used for realizing positioning with an injection mold during secondary injection molding, so that when corresponding positions of the two copper leading-out sheets of the one end of the coil rack and a static spring belt adopt laser welding positioning, the positioning part can enable the coil component to realize positioning in a preset direction. Through improvement of a relay base structure, internal stress generated after integral injection molding of a coil due to deformation of the static spring belt can be eliminated, leading-out terminals of a relay can be guaranteed to be straight after integral injection molding, and thus efficient automated production can be realized and performance can be guaranteed.