40results about How to "Avoid quality fluctuations" patented technology

The invention relates to a method for qualitatively and / or quantitatively classifying injection-molding tools in tool categories and determining preferred intervention ranges and / or manipulated variables for adapting injection-molding machine parameters in the case of changing ambient conditions and / or determining the influence of disturbing effects on the injection-molding process, comprising the following steps: a) providing an injection-molding machine having the injection-molding tool which is to be classified and which is intended for the determination, b) performing at least one injection-molding cycle with injection-molding machine settings in order to obtain a qualitatively adequate injection-molding part, c) determining a quotient Q=[delta]p / [delta]s or Q=[delta]sn / [delta]se characterizing the tool from c.1) a pressure rise [delta]p during the compression phase of the injection-molding cycle and the melt volume [delta]V displaced during the compression phase or c.2) a melt volume [delta]Vn displaced during the holding-pressure phase and the melt volume [delta]Ve displaced during the injection phase, wherein c.3) the corresponding screw travel [delta]s, [delta]sn, and [delta]se is measured in order to determine the displaced volumes [delta]V, [delta]Vn, and [delta];Ve, d) providing at least one limit value (G1...Gx...Gn), wherein one or more recommendations for preferred intervention ranges or manipulated variables for adapting adjustment parameters of the injection-molding machine are associated with ranges (Q < G1; G1 < Q < G2;... Gn-1 < Q < Gn; Q > Gn) for the values of the quotient Q, e) determining in which of the ranges (Q < G1; G1 < Q < G2;... Gn-1 < Q < Gn; Q > Gn) the value of the quotient Q lies, and f) outputting the preferred intervention ranges and / or manipulated variables for adapting the machine parameters of the injection-molding machine which are associated with the determined range.

The invention discloses a threaded hole drilling and tapping machine which comprises a rack. A linear guide rail is arranged at the top of the rack, a linear bearing is arranged on the linear guide rail, the top of the linear bearing is connected with a connecting steel plate, a single-phase double-speed motor is arranged on the connecting steel plate, a lengthened cutter clamp is arranged on an output shaft of the single-phase double-speed motor, and a drilling and tapping composite cutter is arranged at the front end of the lengthened cutter clamp, the output shaft of the single-phase double-speed motor is connected with a differential screw mechanism through a gear transmission mechanism, and the differential screw mechanism is arranged on the rack and used for driving the connecting steel plate. A drill tool does not need to be held manually to control hole drilling and tapping in the machining process, and therefore quality fluctuation caused by previous manual operations is avoided, and machining quality is improved. One motor can provide power for hole drilling, tapping and feeding at the same time, and therefore one motor is saved. The recoil problem in the hole drilling and tapping process is solved, the work process is more stable, and therefore hole drilling and tapping quality is improved.

The invention provides a fresh-keeping process for reeling leftover cocoons when the silk reeling machine stops. After the automatic silk reeling machine stops, the silk reeling soup in the silk reeling tank is drained; glacial acetic acid is mixed with water to obtain an aqueous solution of acetic acid; Spray the obtained acetic acid aqueous solution evenly on the remaining reeled cocoons in the reeling tank with a sprayer, and allow it to soak naturally for 15-20 minutes; slowly add cold water to the reeling tank until the reeling tank is full. The technical process can effectively eliminate the need for parallel operation after parking, so the output can be increased, the consumption can be reduced, the quality fluctuation caused by parallel thread and upper thread can be avoided, the quality can be guaranteed, and the leftover cocoons can have a longer period of time. The fresh-keeping time can prevent the leftover cocoons from going bad and corrupt within 60 hours.

The invention belongs to the technical field of production of a rubber vulcanization accelerator diphenylguanidine and particularly relates to a device and a production method for continuously producing rubber vulcanization accelerator diphenylguanidine. The device for continuously producing the rubber vulcanization accelerator diphenylguanidine comprises a diphenylthiourea and ammonium hydroxide mixed solution metering pump, a catalyst peristalsis metering pump, a pipeline type reactor, a preheater, an oxygen compressor, a gas-liquid separator, a gas-liquid washing tower, a continuous filtering device and an ammonium hydroxide receiver. According to the process, sealed continuous equipment is adopted for producing the rubber vulcanization accelerator diphenylguanidine, so that volatilization of materials in the process is avoided, and the environment is protected while the materials are saved; instant mixing of the materials is realized, the problem that by products are easily generated in a traditional still reaction due to excess ratio of local materials is solved, and the production efficiency is greatly improved; what is more important, after continuous production is adopted, due to small size of equipment, materials in a reaction system of a production site in the same time unit are greatly reduced, and safety risk is greatly reduced.