CN102039658B

CN102039658B - Integral extruding machine and molding process thereof

Info

Publication number: CN102039658B
Application number: CN200910180068.1A
Authority: CN
Inventors: 杨卫民; 汪传生
Original assignee: Qingdao University of Science and Technology
Current assignee: Qingdao University of Science and Technology
Priority date: 2009-10-26
Filing date: 2009-10-26
Publication date: 2013-01-09
Anticipated expiration: 2029-10-26
Also published as: CN102039658A

Abstract

Integral extruder and its molding process of the present invention, the integral extruder is mainly composed of a plurality of extrusion systems and an integral system, the extrusion system is the same as that of a conventional extruder, and the integral system includes a planetary gear pump, coupling The device, driving motor, controller and heating and cooling device are arranged at the front end of multiple extrusion systems. The planetary gear pump has multiple inlets and a main outlet, and each inlet is connected to the front outlet of the corresponding extrusion system. The main outlet is connected with the machine head; the heating and cooling device is arranged around the pump body of the planetary gear pump. The integral extrusion molding process mainly introduces a planetary gear pump to realize the functions of conveying, splitting, pressurizing and metering the high-temperature melt. The invention can realize the function of a high-speed extruder, avoid defects such as uneven mixing and plasticizing of materials, easy thermal decomposition, difficult control of extrusion stability, and easy wear of the screw barrel; it can realize the function of a large and super large extruder , high yield, high efficiency, energy saving; and precise control and measurement.

Description

Integral extruder and moulding process thereof

Technical field

The present invention relates to extrusion molding equipment technology field, refer in particular to a kind of the realization the extrusion moulding product of identical or different kind and extruder and the moulding process thereof of icroextrusion moulded products mass simultaneous production.

Background technology

Extrusion molding occupies very consequence in plastic product forming processing industry.According to statistics, in plastic product forming processing, the output of extrusion moulding product ranks first.With other forming methods relatively, extrusion molding has serialization production, high productivity, be widely used the characteristics with smail investments and quick rerurn.Along with extensive use and the development of plastic extruding forming technology, the type of extruder is increasing.

Extruder high speed, high yield can make the investor obtain larger output and the repayment of great number with lower input.Extruder efficiently be mainly reflected in high production, low energy consumption, low manufacturing cost aspect.In function aspects, screw extruder not only is used for extrusion molding and the mixed refining process of macromolecular material, and its purposes has been widened the fields such as food, feed, electrode, explosive, building materials, packing, paper pulp, pottery.

But, the difficult point that extruder screw rotating speed high speed has also brought a series of needs to overcome: it is uneven that time of staying minimizing in screw rod can cause the mixing plasticizing of material such as material, the excessive shear that stands material may cause the hurried intensification of material and thermal decomposition, extrude stability control difficulty and can cause the fluctuation of extrudate physical dimension, relevant servicing unit and the precision of control system must improve, the wearing and tearing aggravation of screw rod and machine barrel needs to adopt high abrasion and super-high wear-resistant material, and decelerator and bearing are in the situation that the problems such as how improving its life-span that runs up all needs solution.

In addition, realize that the maximization of extrusion equipment can reduce production costs, this is more obvious in aspect advantages such as large-scale twin-screw granulation unit, blown film unit, pipe extruder groups.Yet, the major technologies and equipment that state key construction service is required, the large-sized squeezing granulation unit of one of three large key equipments that large-scale ethylene project is supporting still relies on import for a long time, therefore must increase the proportion of domestic goods more quickly, and satisfies the development of the petrochemical industry needs.And precise treatment can improve the gold content of product, all needs Precise Extrusion such as multi-layer co-extruded laminated film etc., and as the important means that realizes Precise Extrusion---the smelt gear pump research of must going into overdrive to develop.

All round realizing more efficient, more energy-conservation production, this has also just confirmed the inexorable trend of extruding technology development in the innovation of extruding technology.The expert thinks, the future development that the market of the modern Hou of extruder main frame and production line will more become to dropping to high technology content, price.And ultra-large type, superminiature, big L/D ratio, high production, good venting quality etc. become the development defence line of extrusion equipment already, and adapt to the spiro rod machine tube structure of special processing needs, also become the emphasis that everybody falls over each other to research and develop.

Along with the development of extrusion technology, constantly increasing of extruder type is new, and the Novel extrusion forming technique will be brought into play its important function day by day.

Summary of the invention

The purpose of this invention is to provide a kind of many extruders that integrate, can realize rapidly and efficiently Integral extruder and the moulding process thereof of precision extrusion molding.

Integral extruder of the present invention mainly is comprised of a plurality of extrusion systems and an integrating system, and extrusion system is identical with conventional extruder, mainly comprises screw rod, machine barrel, loading hopper, transmission system and heating and cooling system; Integrating system comprises planetary gear pump, shaft coupling, drive motors, controller and heating-cooling device, be arranged on the front end of a plurality of extrusion systems, the drive motors output shaft links to each other by the driving gear shaft of shaft coupling with the planet gear pump, planetary gear pump has a plurality of imports, each import has a corresponding outlet through behind the planetary gear pump, it is a primary outlet that a plurality of outlets compile, and each import is connected with the front end exit of corresponding extrusion system respectively, and primary outlet links to each other with head; Heating-cooling device is arranged on around the pump housing of planetary gear pump.

Extrusion system can adopt the extrusion system of single screw rod or twin-screw or multi-screw extruder, also can adopt the extrusion system of kneader screw extruder or disc extruder.The type of its a plurality of extrusion systems can be the same or different.

Extrusion system can adopt single screw rod, twin-screw, multi-screw extruder, kneader screw extruder or disc extruder two or more types wherein to form.

Heating-cooling device heats planetary gear pump and controls its temperature, with the circulate that guarantees that plastic melt can be in pump, integrating system be mainly used in high-temperature fusant conveying, compile, supercharging and metering.

Can select the planetary gear pump of existing high-precision measuring, it can guarantee stable repeated flow under the condition of various temperature, viscosity, pressure, realizes the purpose of high-precision measuring.

The cooling/heating apparatus of integrating system adopts heating rod, heating collar or heater strip.Can conveniently do repacking to planetary gear pump like this, adopt heating rod namely to get final product in the hole of pump housing processing placement heating rod; Adopting the heating collar suitable heating collar of namely selecting size to be wrapped on the pump housing gets final product; Adopting heater strip namely to embed heater strip on pump housing two sides gets final product.

The extruding-out process process that Integral extruder of the present invention is realized is its extrusion with the difference of conventional extruding-out process process.In extrusion, plastic warp is crossed extrusion system in machine barrel behind the fusion plastification, enters in the import of planetary gear pump of integrating system via the front end exit of extrusion system under pressure, and enters in the pump housing; The controller control drive motors work of integrating system, drive master gear and pinion work through the shaft coupling gear shaft, namely drive the planetary gear pump work, plastic melt flows out from outlet through planetary positive battery metering effect, and compile and enter primary outlet, enter again moulded products in the head; Finish thus the extrusion of integration type extrusion molding; Extrusion needs heating-cooling device to the planetary gear pump heating and is controlled at proper temperature, to guarantee that plastic melt can fully flow therein under molten condition simultaneously.

The present invention still adopts the extrusion system of conventional extruder, therefore can directly improve common extruder, especially middle-size and small-size extruder, utilizing integrating system that a plurality of small-sized extruders are compiled is integrated, can consist of Integral extruder, realize the function of high-speed extruder, medium-and-large-sized extruder even ultra-large type extruder.

The present invention enters integrating system owing to having adopted a plurality of extrusion systems to supply with simultaneously material, feed is fast and sufficient, therefore can be in the situation that the extruder screw low speed rotation obtains the function of high-speed extruder, in the situation that screw rod low speed has just been avoided uneven, the easy thermal decomposition of the mixing plasticizing of material, extruded a series of defectives such as stability is controlled difficulty, spiro rod machine tube is easy to wear, the life-span is low; Can realize function large-scale, the ultra-large type extruder, highly efficient and productive, energy-conservation, avoided again producing technical difficulty large-scale, the ultra-large type extruder large, make the defectives such as processing difficulties, materials are many, only need to be equipped with corresponding large-scale integration system and get final product; And adopted planetary gear pump, therefore the control metering is accurately.

Description of drawings

Fig. 1 is the top view of Integral extruder of the present invention.

Fig. 2 is the front view of the integrating system part of Integral extruder of the present invention.

Among the figure: 1. extrusion system, 2. integrating system, 1-1. screw rod, 1-2. machine barrel, 1-3. heating and cooling system, 1-4. loading hopper, 1-5. transmission system, 2-1. import, 2-2. heating-cooling device, 2-3. planetary gear pump, 2-4. bearing, 2-5. shaft coupling, 2-6. drive motors, 2-7. gear shaft, 2-8. master gear, 2-9. pinion, 2-10. outlet, 2-11. head, 2-12. primary outlet.

The specific embodiment

Differential type extruder of the present invention as depicted in figs. 1 and 2, mainly formed by a plurality of extrusion systems (1) and an integrating system (2), extrusion system (1) is identical with conventional extruder, mainly comprises screw rod (1-1), machine barrel (1-2), loading hopper (1-4), transmission system (1-5) and heating and cooling system (1-3); Integrating system (2) comprises planetary gear pump (2-3), shaft coupling (2-5), drive motors (2-6), controller and heating-cooling device (2-2), be arranged on the front end of a plurality of extrusion systems (1), drive motors (2-6) output shaft links to each other by the driving gear shaft (2-7) of shaft coupling (2-5) with planet gear pump (2-3), planetary gear pump (2-3) has a plurality of imports (2-1), behind each import (2-1) process planetary gear pump (2-3) a corresponding outlet (2-10) is arranged, it is a primary outlet (2-12) that a plurality of outlets (2-10) compile, each import (2-1) is connected with the front end exit of corresponding extrusion system (1) respectively, and the same head of primary outlet (2-12) (2-11) links to each other; Heating-cooling device (2-2) is arranged on around the pump housing of planetary gear pump (2-3).

The extruding-out process process that Integral extruder of the present invention is realized is its extrusion with the difference of conventional extruding-out process process.In extrusion, plastic warp is crossed extrusion system (1) in machine barrel (1-2) behind the fusion plastification, enter in the import (2-1) of planetary gear pump (2-3) of integrating system (2) via the front end exit of extrusion system (1) under pressure, and enter in the pump housing; Controller control drive motors (2-6) work of integrating system (2), drive master gear (2-8) and pinion (2-9) work through shaft coupling (2-5) gear shaft (2-7), namely drive planetary gear pump (2-3) work, plastic melt flows out from outlet (2-10) through planetary positive battery metering effect, and compile and enter primary outlet (2-12), enter again moulded products in the head (2-11); Finish thus the extrusion of integration type extrusion molding; Extrusion simultaneously needs heating-cooling device (2-2) that planetary gear pump (2-3) is heated and is controlled at proper temperature, to guarantee that plastic melt can fully flow therein under molten condition.

Claims

1. An integral extruder, characterized in that: it mainly consists of a plurality of extrusion systems and an integral system, the extrusion system is the same as that of a conventional extruder, mainly including a screw, a machine barrel, a hopper, and a transmission system And heating and cooling system; integral system includes planetary gear pump, coupling, drive motor, controller and heating and cooling device, set at the front end of multiple extrusion systems, drive motor output shaft through the coupling with the active drive of the planetary gear pump The gear shafts are connected. The planetary gear pump has multiple inlets. Each inlet has a corresponding outlet after passing through the planetary gear pump. The multiple outlets are collected into one main outlet. Each inlet is connected to the corresponding front-end outlet of the extrusion system. , the main outlet is connected with the machine head; the heating and cooling device is arranged around the pump body of the planetary gear pump.

2. The integral extruder according to claim 1, characterized in that: its extrusion system adopts the extrusion system of a single-screw extruder or a multi-screw extruder, or adopts a reciprocating screw extruder or a grinding disc extruder. extrusion system.

3. The integral extruder according to claim 1, characterized in that: its integral system adopts a high-precision metering planetary gear pump.

4. The integral extruder according to claim 1, characterized in that: the cooling and heating device of the integral system adopts a heating rod, a heating coil or a heating wire.

5. The integral extruder according to claim 1, wherein the extrusion system is composed of multiple types of single-screw extruder, multi-screw extruder, reciprocating screw extruder or disc extruder.

6. An integral extrusion molding process realized by the integral extruder according to claim 1, characterized in that: in the extrusion process, after the plastic is melted and plasticized in the barrel through the extrusion system, under pressure Through the front outlet of the extrusion system, it enters the inlet of the planetary gear pump of the integral system and enters the pump body; the controller of the integral system controls the drive motor to work, and drives the main gear and pinion to work through the coupling drive gear shaft, that is Drive the planetary gear pump to work, the plastic melt flows out from the outlet through the pressurized and metered action of the planetary gear, and gathers into the main outlet, and then enters the machine head to form the product; thereby completing the extrusion process of integral extrusion molding; extrusion At the same time during the process, the heating and cooling device is required to heat the planetary gear pump and control it at an appropriate temperature to ensure that the plastic melt can fully flow in it in a molten state.