47results about How to "Avoid Adhesive Buildup" patented technology

A system and method applies a plurality of stretched elastic strands onto a substrate such as along a predetermined non-linear path, to form a leg gather of a disposable absorbent personal hygiene product. The system includes an adhesive dispensing module for individually applying adhesive to the elastic strands. A heated strand guide located downstream of the dispensing module includes guide openings for the respective elastic strands. A drive mechanism coupled to the strand guide actuates movement of the strand guide in a direction transverse to the movement direction of the substrate, thereby causing the elastic strands to be applied to the substrate along the predetermined non-linear path.

The invention discloses a preparation method for an upper nozzle used for continuous casting. The upper nozzle is composed of an inner layer and an outer layer, wherein the inner layer comprises aluminum titanate, silicon nitride and aluminum nitride, and the outer layer comprises a porous mullite ceramic particle, fine mullite powder, fine zirconia mullite powder, fine Cr2O3 powder, fine clay powder and 200-mesh active alpha alumina micro powder. The preparation method comprises the following steps: 1) mixing: a step of respectively and uniformly mixing inner layer raw materials and outer layer raw materials in a mixer with stirring and carrying out granulation; 2) molding: a step of respectively subjecting the inner layer and the outer layer of the upper nozzle to compression molding through isostatic pressing; and 3) sintering: a step of drying a molded green body and sintering the green body in a reducing atmosphere at a temperature of 1460 to 1500 DEG C or in an anoxic environment. The upper nozzle has service life of more than 20 h and good thermal shock resistance and can effectively prevent alumina in molten steel from adhesion and accumulation in the inner cavity of the upper nozzle and prevent obstruction of steel flow.

The invention discloses a water filling opening for continuous casting. The water filling opening for the continuous casting is formed by an inner layer and an outer layer; the raw materials of the inner layer comprise, by weight, 76 to 80 parts of minus 200-mesh aluminum titanate, 12 to 14 parts of minus 200-mesh silicon nitride, 6 to 8 parts of minus 200-mesh aluminum nitride and 4 to 6 parts of phenolic resin; raw materials of the outer layer comprise, by weight, 30 to 34 parts of 20-to-200-mesh poriferous mullite ceramic particles, 42 to 46 parts of minus 200-mesh mullite fine powder, 6 to 8 parts of minus 200-mesh zirconium mullite fine powder, 3 to 5 parts of minus 200-mesh chromium sesquioxide fine powder, 4 to 6 parts of minus 200-mesh clay fine powder, 1 to 3 parts of minus 200-mesh active alpha aluminum oxide micro powder and 3 to 5 parts of silica solution; the water filling opening is baked through the above inner and outer layer raw materials under an oxygen-free condition with the temperature to be at 1460 to 1500 DEG C after the raw materials are performed mixing granulation and mechanical pressing.

The invention provides a Chinese yam harvesting device, equipment and method, and relates to the field of agricultural harvesting equipment. The Chinese yam harvesting device comprises a cylindrical bin body and a telescopic rod, wherein the telescopic rod cooperates with a stand through a spherical hinge, the inclined angle between the telescopic rod and the stand is adjusted by swinging around the center of the spherical hinge, a telescopic driving mechanism cooperates with one end of the telescopic rod, the other end is an output end, a cylindrical excavating groove is in coaxial cooperation, the telescopic driving mechanism drives the excavating groove to act through the telescopic rod, and the vertical spacing between the excavating groove and the stand is changed. Entire excavating and taking out of Chinese yams and soil masses on the periphery of the Chinese yams can be realized, excavating in advance is not needed, the Chinese yams are wrapped with a few soil masses, the Chinese yams can be taken out when the soil masses scatter on the ground, and quick and harmless excavating of the Chinese yams can be realized.

The invention discloses a tube-shell type heat exchange device and aims to provide a heat exchange device which can effectively achieve heat exchange between two types of liquid, has temperature difference compensation capacity and can be prevented from being damaged due to over-large temperature difference stress between a shell and a heat exchange tube. The tube-shell type heat exchange device comprises a tube pass part, a shell pass part and a plurality of brackets, wherein the tube pass part comprises a tube pass inlet tube, a tube pass outlet tube and a plurality of heat exchange tubes; the shell pass part comprises an outer heat exchanger shell, a shell pass inlet tube and a shell pass outlet tube; the outer heat exchanger shell consists of a sealing head, a shell head and a tube box; a fixed tube plate is arranged between the shell head and the tube box; a sealing head tube plate is arranged between the sealing head and the tube box; a tube pass flow partition plate partitions the interior of the shell head into a tube pass inflow cavity and a tube pass outflow cavity; an expansion joint is arranged on the tube box. The tube-shell type heat exchange device has the beneficial effects that according to the characteristic hat the expansion joint is relatively easy to deform, by the cooperation of the slidable sealing head tube plate, the structural temperature difference compensation effect can be achieved, and the structural damage caused by over-large temperature difference stress is avoided.

The invention discloses a chemical engineering heat exchanger and aims to provide a heat exchanger which can effectively realize heat exchange between two liquors, has capability of temperature difference compensation and can be prevented from being damaged due to excessively large temperature difference stress between a shell and heat exchange tubes. The chemical engineering heat exchanger comprises a tube pass part, a shell pass part and a plurality of brackets, wherein the tube pass part comprises a tube pass inlet tube, a tube pass outlet tube and the plurality of heat exchange tubes; the shell pass part comprises a heat exchanger shell body, a shell pass inlet tube and a shell pass outlet tube; the heat exchanger shell body comprises a seal head, a shell head and a tube box; a fixed tube plate is arranged between the shell head and the tube box; a seal head tube plate is arranged between the seal head and the tube box; a tube pass flow baffle is used for dividing the interior of the shell head into a tube pass inflow cavity and a tube pass outflow cavity; an expansion joint is arranged on the tube box. The chemical engineering heat exchanger has the benefits that a structural temperature difference compensation effect can be achieved in combination with the slidable seal head tube plate based on a characteristic of easiness for deformation at the expansion joint, and structural damage caused by excessively large temperature difference stress is avoided.

The invention discloses a double-pass double-liquid heat exchange device and aims to provide a heat exchange device which can effectively realize heat exchange between two liquid, has the temperature difference compensation capacity and can prevent a shell and heat exchange tubes from being damaged caused by overlarge temperature difference stress between the shell and the heat exchange tubes. The double-pass double-liquid heat exchange device comprises a tube pass part, a shell pass part and a plurality of support frames, wherein the tube pass part comprises a tube pass inlet tube, a tube pass outlet tube and a plurality of heat exchange tubes; the shell pass part comprises a heat exchanger shell, a shell pass inlet tube and a shell pass outlet tube; the heat exchanger shell consists of a sealing head, a shell head and a tube box; a fixed tube plate is arranged between the shell head and the tube box; a sealing head tube plate is arranged between the sealing head and the tube box; the inner part of the shell head is divided into a tube pass flow inlet cavity and a tube pass flow outlet cavity through a tube pass flow isolation plate; an expansion joint is arranged on the tube box. The double-pass double-liquid heat exchange device has the benefits that through the characteristic that the deformation of the expansion joint is relatively easy and in cooperation with the slideable sealing head tube plate, a structural temperature difference compensation function can be realized, and the structure damage caused by overlarge temperature difference stress is avoided.

The invention discloses a traditional Chinese medicine decoction piece crushing process and device thereof in the technical field of traditional Chinese medicine decoction piece crushing. The traditional Chinese medicine decoction piece crushing process comprises the following steps that 1, decoction pieces are placed on a partition plate, a sealing block is manually pushed aside to enable the decoction pieces to enter a telescopic bent pipe along a drainage notch and flow into a filter barrel, and then the sealing block is sealed. According to the traditional Chinese medicine decoction piece crushing process and the device thereof, when the decoction pieces are crushed by a filter box, a swing mechanism can swing and shake the filter barrel while a blade is rotated at a high speed for crushing, so that the crushed medicine powder can flow out of the filter barrel, the appropriate space is guaranteed when the decoction pieces in the filter barrel are crushed and shaken, the slices which are not cut and crushed can be quickly moved to the position where the slices can be crushed under the action of shaking, then the problem that the decoction pieces distributed on the upper side and the lower side of the blade cannot be moved to the position of the crushing blade in time, and consequently the decoction pieces cannot be cut is solved, the uniformity of crushing of the decoction pieces is guaranteed, and the crushing effect is improved.

The invention relates to an automatic weighing and batching system for carbon black powder. A pneumatic sieve is arranged at the inner side of a material loading hopper and at the entrance of the upper edge, and the upper part of the material loading hopper is connected with a dust recycling device; a material unloading hopper is connected with the lower edge of the material loading hopper, the lower end of the material unloading hopper is connected with a horizontally arranged feeding cylinder, a spindle provided with a material pushing blade is arranged at the inner side of the feeding cylinder, one end of the spindle extends from one end of the feeding cylinder and then is connected with an output shaft of a feeding motor reducer, and the other end of the feeding cylinder is connected with a first pipeline by virtue of a discharging valve; one end of the first pipeline is connected with a filtration piece, the other end of the first pipeline is communicated with the inner cavity ofa metering hopper, and the metering hopper is supported on a platform by virtue of a pressure sensor; an upper opening of the metering hopper is connected with a roots fan by virtue of a filter; an outlet at the lower end of the metering hopper is connected with the upper end of a hose by virtue of a first valve, the lower end of the hose is connected with one end of a feeding pipe by virtue of asecond valve and a vibrating valve, and the other end of the feeding pipe is connected with an internal mixer; and a crane is arranged above the entrance of the upper edge of the material loading hopper. The automatic weighing and batching system for the carbon black powder has the advantages that both time and labor are saved, efficiency is high, labor intensity is low, and no pollution is produced.

The invention discloses a dead-angle-free production allocation machine which comprises a barrel (2), at least one oil outlet pipe (5), a center pipe (3) and a blanking plug (1). The center pipe (3) is arranged in the barrel (2) and is connected with the inner wall of the barrel (2), the lower end of the blanking plug (1) is arranged in the center pipe (3), at least one oil inlet (6) is formed in the lower portion of the blanking plug (1), a plurality of oil outlets (7) are formed in the upper portion of the blanking plug (1), and an arc surface is arranged on the upper portion of the inner wall of an oil inlet cavity of the blanking plug (1). The dead-angle-free production allocation machine with the structure has the advantages that dead angles of current-layer oil gas on the upper portion of the oil inlet cavity can be eliminated when the current-layer oil gas flows in the blanking plug (1), high-viscosity components in the oil gas can be prevented from being adhered and accumulated in the dead angles, can drop under the vibration effects of production pipes and then are fed into an oil outlet cavity along with the current-layer oil gas, and accordingly the oil outlets (7) can be prevented from being blocked by fluid which turns viscous suddenly.

The invention relates to a drying device for composite plastic particles. The drying device comprises a device main body, a drying box, a heating device and traveling wheels, wherein the device main body is arranged above the drying box; the traveling wheels are arranged at four corners of the bottom surface of the drying box; and an aggregate cavity is formed in the device main body. According tothe drying device for the composite plastic particles, a distributing block is arranged below a leakage hole and can disperse materials in the leakage hole, so that incomplete drying caused by plastic particle accumulation is avoided, and therefore, the drying efficiency is greatly improved; and the rear side of a conveying device is provided with a uniform heat box, a heat outlet of the uniformheat box is flush with the upper surface of the conveying device, and due to the design, the drying speed of the plastic particles is greatly improved, waste of heat is avoided, and energy consumptionis reduced.