Coupled control precision extrusion molding process
An extrusion molding and coupled technology, applied in the field of precision extrusion technology, can solve the problems of lack of online adjustment and post-control, the inability to solve the lateral fluctuation of the head mold, and the inability to extrude high-viscosity engineering plastics, etc., to achieve low cost, The effect of high processing precision and simple processing technology
Inactive Publication Date: 2009-10-07
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Problems solved by technology
[0007] However, the shortcomings of this precision extrusion are also obvious. First, its controllability is completely dependent on the design and processing of the melt gear pump located in the middle of the system, lacking the ability of online adjustment and post-control; secondly, due to the structure of the gear melt pump Due to limitations, it is impossible to extrude high-viscosity engineering plastics, especially fiber-reinforced engineering plastics; third, it is impossible to solve the lateral fluctuation caused by the mold of the head; and it is difficult to realize innovation on existing equipment; in addition, it is equivalent to ordinary extrusion equipment The high price of 4 to 5 times also makes many companies daunted
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[0014] The present invention is described in detail below with reference to accompanying drawing:
[0015] The coupled control precision extrusion process is a novel precision extrusion control method. It divides the content of precision extrusion into two systems: flow system and size system, and adopts dual system coupling to meet the requirements of stability and precision. The flow system realizes the stability of the extrusion flow on the basis of improving the barrel screw temperature control, screw speed control and traction drag speed control level, rationally designing the screw structure of the extruder, and optimizing the flow rate of the extruder head. The controlled multi-point primary cold sizing and multi-point secondary thermal sizing are coupled to approximate the size to obtain high-precision dimensions of the extruded product.
[0016] Including (1) Optimum design of the screw for engineering plastic extrusion. Reasonable design of the screw according to th...
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The invention relates to a coupled control precision extrusion molding process, relating to a precision extrusion process. The process divides the precision extrusion content into two systems for coupling, namely, a flow system and a size system; the flow system realizes the stability of extrusion and flow on the basis of improving the temperature control of a screw in a machine barrel, screw rotary speed control and traction-towed speed control level, designing the screw structure of an extruding machine and optimizing the flow of extruding machine head; and the size system obtains the high precision size of extruded product by adopting coupled approximation size of controllable multipoint primary cold sizing and multipoint secondary hot sizing. The adoption of the coupled control precision extrusion molding process has high processing precision, simple processing process and low cost.
Description
technical field [0001] The invention relates to a precision extrusion process, which can strictly control the elements of the extrusion process, and realize the molding process of high-precision geometric dimensions of extruded products and high micro-uniformity of materials. Background technique: [0002] Today, with the rapid increase in the variety and quantity of plastic products, people have higher and higher requirements for the geometric accuracy and intrinsic performance uniformity of extruded products, especially with the introduction of high-performance and environmental protection concepts in industries such as automobiles and construction. , the society has a more urgent desire for the demand and precision of engineering plastic extrusion products. The realization of precision extrusion molding of engineering plastics is of great scientific significance. On the one hand, it can meet the molding requirements of some engineering plastic products that have strict re...
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Login to View More IPC IPC(8): B29C47/00B29C47/92B29C47/60B29C47/90B29C48/395B29C48/90B29C48/92
CPCB29C48/92B29C2948/92704B29C48/395B29C2948/9258B29C2948/9259B29C2948/92609B29C2948/92885B29C2948/92895B29C2948/92923
Inventor 葛铁军李越
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY