38results about How to "Improve plasticizing quality" patented technology

The invention provides a high-speed PB tube single screw, which comprises a feeding section, a separation-type melting section and a mixing-type extruding section, wherein the separation-type melting section is provided with a main screw edge and two auxiliary screw edges, the depth of a screw channel of the feeding section is 7mm to 8mm, the lead of the main screw edge is 105 to 110 mm, and the lead of the auxiliary screw edges is respectively 107 mm and 84 mm. The high-speed PB tube single screw solves the phenomenon of the prior PB tube screw that the productivity is difficult to be improved at the high speed, the plasticized quality is poor and the temperature of the fuse is too high, and can obtain the PB melting plastics with good plasticized quality and high productivity (300kg/hour).

A machine for regenerating and granulating the used or rejected plastics is composed of exhaust-type extruder, filter, cutting-granulating unit, screw conveyer, drier and air delivering system.

The invention discloses a method for recycling waste plastic for pipeline anticorrosion, belonging to the technical field of high molecular materials applied to steel tube anticorrosion. The method is characterized by comprising the following steps: crushing; cleaning; re-proportioning anticorrosive 3PE (Poly Ethylene) waste plastic of a pipeline 3, namely the ratio of regenerating prilling materials: resin: an antioxygen: a processing agent=( is (80-70):(18-15):0.2:1.0. After prilling, the quality of the waste plastic satisfies the demand of technical standard (SY/T0413-2002) on the polyethylene anticorrosive layer of the buried steel pipeline, and the waste plastic can be reused to 3PE anticorrosion. The environmental pollution is eliminated and the environment problem is solved. The cost of raw materials for pipeline anticorrosion is saved, the utilization ratio of resources is improved, and the domestic blank is filled. The method belongs to circular economy, obtains good economic and social benefits, and has better popularization and application valves.

The invention provides a heating device and a plastifying device used for improving the cable inner end plastifying quality. The heating device comprises an annular structure formed by at least two circular arc heaters. The heaters are connected through hinges. At least one buckling component used for connection is arranged at the connecting positions between the heaters to form an opening-closing structure to be used for being arranged on a mold of the plastifying device in a sleeved mode. Each heater is provided with an electric insertion groove used for heating. The electric insertion grooves of the heaters are jointly connected to temperature feedback devices at the corresponding positions of the plastifying device. According to the heating device and the plastifying device, the two semi-circular-arc heaters are adopted, assembly and disassembly are conveniently achieved, and therefore the mold can be conveniently assembled, disassembled and adjusted; meanwhile, a temperature control system is connected with the temperature feedback device at the feeding section or the flange position, heating control and cooling control are accurately achieved, and the product quality is guaranteed.

The invention relates to the technical field of pipeline connection structures and equipment thereof, and relates to a double-wall corrugated pipe injection molding flaring machine. The double-wall corrugated pipe injection molding flaring machine comprises a feeding mechanism, a conveying mechanism and an extrusion mechanism which are sequentially connected, wherein the extrusion mechanism comprises a mold-locking mechanism which is connected with the conveying mechanism, and a single-screw extruder; after entering the mold-locking mechanism, a material is extruded by the single-screw extruder; the single-screw extruder is connected with a hydraulic station. The double-wall corrugated pipe injection molding flaring machine adopts the single-screw extruder which is made of polyethylene (PE) and is high in efficiency and low in power consumption, so that the material amount required by a flaring part of a PE double-wall corrugated pipe is realized at high speed and with high yield, the material is high in plasticizing quality, and the flaring quality is ensured. According to the double-wall corrugated pipe injection molding flaring machine, in an injection molding flaring manner, the defects of the PE double-wall corrugated pipe for flaring in the conventional manner can be overcome, the flaring quality is high, the length of a pipe material is changeable, and the flaring shape can be determined by a customer.

The invention discloses an injection molding mechanism capable of evenly heating and efficiently plastifying. The injection molding mechanism comprises a heating screw rod (1), a heating cavity (2), a charging barrel (3) and a sprue bush connection end (4), and also comprises a rafael net (5), wherein the heating screw rod (1) is horizontally arranged inside the rafael net (5); one end of the rafael net is connected with a motor; the motor drives the rafael net (5) to rotate; the rotation direction of the rafael net (5) is reverse to that of the heating screw rod (1); a screw cooling water pipe is arranged on the outer surface of the lower end of the charging barrel (3); a conical baffle plate (6) of which the top and the bottom are communicated is arranged inside the heating cavity (2); the narrow end of the conical baffle plate (6) is communicated with the sprue bush connection end (4); the round edge of the wide end of the conical baffle plate (6) is connected with the heating cavity (2). The injection molding mechanism can fully agitate, the plastifying homogeneity is improved, the situation that the injection molding particles are fused in the charging barrel to block a discharge hole is avoided, the pressure at the end of the sprue bush is kept constant, and the actual injection molding amount is accurate.

The invention discloses a screw of an injection molding machine. The screw comprises a body and a feed chute spirally embracing the surface of the body. The diameter of the body is equal from head totail. The depth of the feed chute is gradually increased from head to tail. Multiple grooves with square openings are formed in the feed chute at intervals. The surface of the body and the surface ofthe feed chute are covered with ceramic coatings. By means of the screw of the injection molding machine, molten plastic can smoothly flow to the discharge end conveniently, resistance is low, the molten plastic is not likely to be stagnated, and the production efficiency is high. The molten plastic is evenly mixed, bubbles are not likely to be generated, and the plastifying quality is high. The screw is high in corrosion resistance, resistant to abrasion and high temperature and more durable.

The invention provides a plastic injection moulding machine and an injection screw thereof. The injection screw comprises a thread part and a mixing member which are connected mutually, an external thread is arranged on the thread part, and the thread part is sequentially provided with a feeding segment, a compression segment and a wave homogenizing segment in the spiral direction of the externalthread; and at least six waves are arranged on the wave homogenizing segment, each wave is composed of a first wave segment and a second wave segment with a 180-degree phase difference, and the firstwave segments and/or the second wave segments are arranged eccentrically and are composed of wave troughs and wave crests which are uniformly distributed along the circumference of the screw. Throughthe improvement of the structure, the problem of plastic uniformity of the injection screw in the plasticating process is achieved, the plastic performance can further be protected, so that the effectthat the injection screw realizes performance complementation in four aspects of plasticizing quality, rapidness and high efficiency, universality and energy consumption is achieved; and meanwhile, the injection screw can further be widely applied to universal type various reciprocating type screw plastic injection moulding machines, and various shear sensitivity high molecular materials or highmolecular materials and inorganic fillers are machined.

The invention provides a macromolecule plasticizing transportation method based on extrusion and stretching, and a macromolecule plasticizing transportation module, device and equipment. The method comprises the steps that the size of a transportation space for transporting macromolecular materials is periodically changed from small to large and then from large to small in sequence; in the processthat the size of the transportation space is changed from small to large, the macromolecular materials are forcibly contained in the transportation space; and in the process that the size of the transportation space is changed from large to small, the macromolecular materials are compacted and plasticized under the action of normal stress and then are forcibly discharged, and therefore forward transportation and plasticized conveying of the macromolecular materials are achieved through size change of the transportation space. According to the method, the module, the device and the equipment,the thermo-mechanical process of the plasticizing transportation process can be shortened, the plasticizing transportation energy consumption is reduced, the transportation efficiency is improved, andthe equipment size and occupied space are reduced.