Method for stabilizing pressure of outlet of screw extruder and constant-pressure machine head of screw extruder
A technology of screw extruder and outlet pressure, which is applied in the field of constant pressure head of screw extruder and stable outlet pressure of screw extruder, which can solve the problem of manual adjustment, barrel pressure cannot be preset, and barrel pressure cannot be maintained Stability and other issues, to achieve the effect of maintaining consistency and performance
Pending Publication Date: 2020-02-14
GUILIN RUBBER IND NEW TECH DEV IND CORP
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Problems solved by technology
However, this throttling mechanism cannot automatically adjust the flow cross-sectional area as the pressure in the barrel changes, and the pressure in the barrel cannot be preset according to the viscoelasticity of the rubber, the feeding state, and the screw speed. Requires real-time manual adjustment based on experience
[0005] Therefore, the existing extruder can neither pre-set the required internal pressure of the barrel nor keep the pressure in the barrel stable.
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[0025] The technical solutions of the present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.
[0026] The screw extruder constant pressure head of the present invention has a structure comprising a discharge barrel 1 , a piston sleeve 4 , a piston cylinder 5 and a hydraulic control circuit 9 .
[0027] The left end 1-1 of the mouth of the discharge cylinder 1 (the length is 360 mm) is installed and connected (flange connection structure) with the discharge end of the barrel of the single-screw extruder (the inner diameter of the cylinder is 120 mm), and the A discharge port 2 in the shape of an isosceles fan is opened in the center of the cylinder body. Along the axial direction of the discharge cylinder 1 from left to right, the circumference of the discharge port 2 gradually increases. The left and right ends of the discharge port 2 The axial length of the cylinder is 283mm, the left end is the tip, the right...
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Abstract
The invention discloses a method for stabilizing the pressure of an outlet of a screw extruder and a constant-pressure machine head of the screw extruder. The constant-pressure machine head of the screw extruder comprises a discharge barrel, one end of the discharge barrel is connected to the discharge end of a machine barrel of the screw extruder, at least one discharge port in the axial direction is formed in a barrel body of the discharge barrel, a piston sleeve communicating with the discharge barrel is arranged at the other end of the discharge barrel, the diameter of a piston in the piston sleeve is matched with the barrel diameter of the discharge barrel, the piston moves axially in the discharge barrel under the control of a liquid flow pressure stabilizing system and is located atthe position balanced with the extrusion pressure in the discharge barrel, and the size of the balance position where the piston is located corresponds to the size of the discharge port opened by thepiston. According to the method for stabilizing the pressure of the outlet of the screw extruder and the constant-pressure machine head of the screw extruder, the pressure of the machine barrel, especially the pressure of the outlet, can be set according to the mixing requirements of rubber materials, in addition, the stability of the pressure at the outlet of the extruder can be automatically kept, and therefore the performance of the mixed rubber materials is kept consistent.
Description
technical field [0001] The invention relates to screw extruder equipment, in particular to a method for stabilizing the outlet pressure of a screw extruder and a constant pressure head of the screw extruder. Background technique [0002] In the rubber and plastic processing industry, the screw extruder is a kind of mixing, dispersing, plasticizing and molding equipment, especially in the rubber processing industry, the screw extruder is often used as a supplementary mixing, dispersing, Plasticizing equipment. [0003] For a screw extruder with a certain configuration, its mixing, dispersing, and plasticizing effects are closely related to the pressure in the barrel. However, the pressure of the barrel is affected by the resistance of the machine head, the screw speed, the feeding state, the physical properties of the rubber, and the thermal state. It is not very stable, and even fluctuates greatly. As a result, the mixing performance of the rubber varies greatly. , serious...
Claims
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IPC IPC(8): B29C48/25B29C48/92
Inventor 黄愔李锐颖樊立贤曾勇
Owner GUILIN RUBBER IND NEW TECH DEV IND CORP