Location:Home > News information > Industry news > 正文
Contact
Dongguan Baoding Precision Instrument Co. Ltd.
Miss.Cai 13717346368
Telephone: 0769-85588096Fax: 0769-82688299
Email: 13717346368@163.com
URL: www.baodingyiqi.com
Address: No. nine Park Avenue, Houjie Town, Guangdong, Dongguan, China, No. 23
Analyze the extrusion system knowledge of the laboratory extruder
Analyze the extrusion system knowledge of the laboratory extruder
The extrusion system comprises a screw, a barrel, a hopper, a die head and a mold. The plastic is plasticized into uniform melt by the extrusion system, and the extruder head is continuously pressed under the established pressure in the process.
(1) screw: it is the most important component of the extruder. It is directly related to the application range and productivity of the extruder. It is made of high strength corrosion resistant alloy steel.
(2) cylinder: it is a metal cylinder. It is usually made of composite steel pipes of heat-resistant, high compressive strength, strong wear resistance, corrosion-resistant alloy steel or lined with alloy steel. The cylinder is matched with the screw rod to realize the crushing, softening, melting, plasticizing, exhausting and compacting of the plastics, and continuously and evenly transport the rubber material to the forming system. The length of the ordinary cylinder is 15~30 times of its diameter, so that the plastic can be fully heated and fully plasticized.
(3) hopper: the bottom of the hopper is equipped with a cut-off device in order to adjust and cut off the material flow, and the side of the hopper is equipped with a visual hole and a calibration measuring device.
(4) head and die: the head is made up of alloy steel inner sleeve and carbon steel coat, and the die head is provided with forming die. The role of the head is to change the rotational movement of plastic melt into parallel linear motion, evenly and smoothly into the mold sleeve, and give plastic to the necessary molding pressure.
Plastic in the cylinder plastic compaction, through the porous filter plate along the channel through the head neck into the die mold, mold die sleeve with the appropriate form, the annular space section decreases, the plastic melt formed around the tubular continuous dense core wire coating. In order to ensure that the plastic channel in the head is reasonable and the dead angle of the plastic accumulation is eliminated, a diversion sleeve is often arranged to eliminate the fluctuation of the pressure when the plastic is extruded, and also the equalizing ring is arranged. The die head is also provided with a die correcting and adjusting device, which is convenient for adjusting and correcting the concentricity of the die core and the die sleeve.
The extrusion system comprises a screw, a barrel, a hopper, a die head and a mold. The plastic is plasticized into uniform melt by the extrusion system, and the extruder head is continuously pressed under the established pressure in the process.
(1) screw: it is the most important component of the extruder. It is directly related to the application range and productivity of the extruder. It is made of high strength corrosion resistant alloy steel.
(2) cylinder: it is a metal cylinder. It is usually made of composite steel pipes of heat-resistant, high compressive strength, strong wear resistance, corrosion-resistant alloy steel or lined with alloy steel. The cylinder is matched with the screw rod to realize the crushing, softening, melting, plasticizing, exhausting and compacting of the plastics, and continuously and evenly transport the rubber material to the forming system. The length of the ordinary cylinder is 15~30 times of its diameter, so that the plastic can be fully heated and fully plasticized.
(3) hopper: the bottom of the hopper is equipped with a cut-off device in order to adjust and cut off the material flow, and the side of the hopper is equipped with a visual hole and a calibration measuring device.
(4) head and die: the head is made up of alloy steel inner sleeve and carbon steel coat, and the die head is provided with forming die. The role of the head is to change the rotational movement of plastic melt into parallel linear motion, evenly and smoothly into the mold sleeve, and give plastic to the necessary molding pressure.
Plastic in the cylinder plastic compaction, through the porous filter plate along the channel through the head neck into the die mold, mold die sleeve with the appropriate form, the annular space section decreases, the plastic melt formed around the tubular continuous dense core wire coating. In order to ensure that the plastic channel in the head is reasonable and the dead angle of the plastic accumulation is eliminated, a diversion sleeve is often arranged to eliminate the fluctuation of the pressure when the plastic is extruded, and also the equalizing ring is arranged. The die head is also provided with a die correcting and adjusting device, which is convenient for adjusting and correcting the concentricity of the die core and the die sleeve.
