CN1586862A - Crew extruding table type quick forming machine - Google Patents
Crew extruding table type quick forming machine Download PDFInfo
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- CN1586862A CN1586862A CN 200410053509 CN200410053509A CN1586862A CN 1586862 A CN1586862 A CN 1586862A CN 200410053509 CN200410053509 CN 200410053509 CN 200410053509 A CN200410053509 A CN 200410053509A CN 1586862 A CN1586862 A CN 1586862A
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- shower nozzle
- screw extrusion
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- forming machine
- nozzle
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Abstract
The desk type screw extruding quick forming machine includes servo control system, material feeding mechanism, spray and worktable. The servo control system includes longitudinal servo mechanism, transverse servo mechanism and vertical servo mechanism; the material feeding mechanism, the spray and the transverse servo mechanism are connected successively; the spray is screw extruding spray comprising stepped motor, screw, heater and nozzle of copper; and the vertical servo mechanism controls the elevation of the worktable. The present invention has raised forming quality and speed, no need of forming chamber, forming of the molten material under room temperature without need of maintaining temperature, and other advantages.
Description
Technical field
The present invention relates to the RP technique field, particularly the desk-top fast forming machine of screw extrusion.
Background technology
(RAPID PROTOTYPING-RP) technology that is shaped fast is an emerging technology that grows up in the later stage eighties.Though the time of research and development is not long, RP has grown into a mature technique.
In rapid forming system, mainly containing with the filamentary material based on the screw extrusion shower nozzle technology of fusion sediment forming technology is that the FDM series fast forming machine of U.S. STRATASYS company of raw material and the MEM series fast forming machine of Tsing-Hua University are representative.The basic principle of this class technology is: utilize two (or a plurality of) to provide driving force by motor-driven friction pulley, send the silk material to shower nozzle material passage inlet, the heating shower nozzle is under heater and thermoregulator effect, keep constant temperature, and the working chamber also will keep constant temperature (than room temperature height), the assurance silk is expected by the back from the solid-state molten state that becomes, the molten state material is extruded from the nozzle than minor diameter, form material and pile up the path, on operating desk, form workpiece, under computer control, realize fast shaping technology based on melt extruded stack shaping principle.
By the basic principle of above-mentioned this forming machine as can be known, this rapid forming system mainly comprises hardware system, software systems, feeding system.Hardware system has mechanical movement load bearing component and electrical equipment motion control and temperature control etc.
Mechanical system mainly comprises unit such as motion, shower nozzle, working chamber, usable material chamber, switch board and power cabinet.The common mechanical system adopts modularized design, and each unit is separate.Only finish scanning and lifting action as moving cell, and the complete machine kinematic accuracy only is decided by the precision of moving cell, irrelevant with other unit.Therefore, each unit can adopt different designs according to its functional requirement.Moving cell and ejection head unit are higher to required precision, the selecting for use and the processing of part of its parts of special concern.Power supply room and control room need have interference of preventing and anti-jamming capacity, should adopt shielding measure.
Can realize straight line, circular interpolation and multi-shaft interlocked function based on the motion control card of PC bus.Shower nozzle control possesses the wire vent control function to shower nozzle, finishes leading and hysteresis motion compensate function, controls the accurate start and stop of shower nozzle simultaneously.
Control system has been equipped with temperature control equipment, respectively Detection ﹠ Controling shaping nozzle, support nozzle and working chamber's temperature.Shaping nozzle, support nozzle and working chamber's control accuracy of temperature very accurate (less than ± 1 °), variation of temperature all has great influence to the dimensional accuracy and the surface quality of product.
Software systems are divided Geometric Modeling and information processing two parts.The Geometric Modeling unit be by the designer by CAD software, the physical model of the data reconstruction product that obtains as the physical model of structure products such as Pro-E, AutoCAD, UG or by the three-dimensional measurement instrument.Export the geological information of prototype at last with the STL form.
Information process unit is made up of modules such as stl file processing, PROCESS FOR TREATMENT, digital control, figure demonstrations, finish respectively stl file debugging and error correction, cross-sectional layers file generate, fill calculate, numerical control code generates and to the control of formation system.The PROCESS FOR TREATMENT module judges according to stl file whether needs support in the product forming process, in the time will supporting, design supporting construction and generation earlier supported, then to the stl file hierarchy slicing, according to the fill path of each layer, export the CLI file format of shaping system requirements at last.
Feeding system adopts continuous feed mechanism, drives the roller driving silk material that is lined with rubber by a motor and enters the next stage pressing mechanism.Distance between two rollers can be adjusted by moving radially of another roller.Guarantee that the silk material is clamped by two rollers, can not skid.It is that silk is expected that manufacturing system requires moulding material and backing material, and has low solidification shrinkage rate, steep temperature-viscosity curve and certain intensity, hardness, pliability.Thermoplastics such as ABS, nylon, paraffin are through suitably using after the modification.
The major defect of this forming machine has: the relation of not resolving combination between and pressure variation three at a high speed mobile based on the material of the required high pressure of layer manufacturing technology, high speed fully; Forming speed is slow, and the flow of extruded material is lower, is generally less than 0.1cm
3/ s, thus shaping efficiency and shaping speed reduced; Shaping must be carried out in being higher than the constant temperature of room temperature, makes the machine construction complexity, and operating cost increases; The present price of this machine is higher, between 40～1,000,000 RMB, belongs to the high price machine, is difficult to promote.
Shower nozzle is a critical component of realizing the melt extruded stack shaping, be prerequisite and the core that realizes stack shaping well, whether nozzle structure design and control method be reasonable, can be directly connected to forming process carry out smoothly, and influence the quality of profiled member, comprise mechanical performances such as surface roughness, dimensional accuracy, intensity, rigidity.
High polymer material is widely used in all trades and professions because of its good performance, and exploitation is key and the prerequisite that realizes that high polymer is shaped based on the nozzle system of high polymer material.But high polymer has bigger viscosity, and is mobile relatively poor, need bigger motive force when flowing, and motional inertia is also bigger, and therefore start and stop in real time are difficult to realize.
Summary of the invention
The object of the present invention is to provide the desk-top fast forming machine of a kind of screw extrusion, do not need to design the working chamber.Can improve the viscosity of the extruded velocity and the extruded material of nozzle material by the screw extrusion shower nozzle, reduce the sectional area of extruded material, improve the forming quality and the forming speed of fusion sediment fast forming machine.And the vertical servo control mechanism control worktable lifting that adopts servo-control system is to improve forming quality.
For achieving the above object, the present invention is achieved in that
The desk-top fast forming machine of a kind of screw extrusion, comprise servo-control system, feed mechanism, shower nozzle and workbench, described servo-control system comprises servo longitudinal mechanism, horizontal servo control mechanism and vertical servo control mechanism, described feed mechanism links to each other with shower nozzle, described shower nozzle links to each other with horizontal servo control mechanism, described shower nozzle is the screw extrusion shower nozzle, described screw extrusion shower nozzle comprises stepper motor, by described stepper motor driven screw rod, heater and nozzle, the material of described nozzle can be a copper, the vertical servo control mechanism control worktable lifting of described servo-control system.
As an improvement of the present invention, also be connected with the backing material shower nozzle at described horizontal servo control mechanism.
Improve as of the present invention another, the heater of described screw extrusion shower nozzle is an electrical bar.
The present invention adopts the screw extrusion nozzle structure, has improved the forming quality and the forming speed of fusion sediment fast forming machine; Forming machine does not need to design the working chamber, and melted material at room temperature is shaped, and does not need insulation, and machine construction is simple, control is convenient, and easy to implement, the cost of machine also is reduced to 15～200,000 yuans, promote easily, and volume is little, the peripheral hardware that can be used as office computer uses; In addition, machine tool mechanical structure of the present invention adopts exquisite planer-type frame, and it is little to start inertia, and speed is fast.
Description of drawings
Fig. 1 is a screw extrusion shower nozzle schematic diagram
Fig. 2 is the desk-top fast forming machine structural representation of screw extrusion of the present invention
The specific embodiment
The present invention will be further described below in conjunction with drawings and Examples.
The desk-top fast forming machine of a kind of screw extrusion, as shown in Figure 2, wherein part 2,4,12 is respectively a servo control mechanism vertical, horizontal, vertical direction, realizes the motion of three change in coordinate axis direction, they are controlled by control system 1.The feed speed of feed mechanism 6 control filamentary materials.It must coordinate control with the sweep speed of shower nozzle.Filamentary material 5 becomes molten state after heater coil 7 heating, enter screw extrusion 9, and nozzle 15 ejections from shower nozzle are coated on the surface of the work on the workbench 11.Filamentary material 5 is through two pressurization: the first step of supercharging is to increase absolute pressure, is produced by feed mechanism 6, and filamentary material 5 experience are from the initial pressure to the intermediate pressure.Initial pressure is the atmospheric pressure of surrounding environment normally.Intermediate pressure is to be in initial pressure and filamentary material 5 to be released pressure between the surge pressure of nozzles 15.Require intermediate pressure to measure under the volume deposition velocity, filamentary material 5 is advanced the inlet of the second step supercharging in greatest requirements.Especially require intermediate pressure to be sure of fully flowing of filamentary material 5, under the mensuration volume deposition velocity of all expectations, arrive the supercharging second stage, guarantee the uninterrupted mobile of filamentary material 5; The second stage of supercharging is to realize by screw extrusion machinery, and it increases absolute pressure, and under predetermined speed, filamentary material 5 to any required instantaneous pressure from nozzle 15 release materials, arrives maximum required mensuration volume deposition velocity from middle pressure.
Fig. 1 is a screw extrusion shower nozzle schematic diagram.Wherein, screw rod 14 in the screw extrusion shower nozzle can drive along the same stepper motor 13 of R direction rotation with wire feeder 6 usefulness, after outer computer sends instruction, stepper motor 15 drive screws 14, simultaneously, by odontoid belt transmission mechanism 16 and feeding roller 6 filamentary material 5 is sent into the screw extrusion shower nozzle again, in the screw extrusion shower nozzle, because the effect of electrical bar 8, filamentary material 5 is molten condition, and under the pushing of screw rod 14, be coated on the workbench 11 by copper nozzle 15.Meanwhile, outer computer is at the result of workpiece three dimensional computer modeling along the short transverse section, the outline data of different cross section layer is reached control system, this system drive workbench and screw extrusion shower nozzle are done resultant motion along the X-Y direction, thereby make the plastics that apply and be set on the workbench form the corresponding cross section profile of workpiece.After finishing the coating of one deck, the thickness (being about 0.1mm usually) of a cross-sectional layers of vertical servo control mechanism 12 control workbench, 11 declines of described servo-control system repeats the coating of next cross section profile, then until the shaping of finishing whole work-piece.
Claims (4)
1. desk-top fast forming machine of screw extrusion, comprise servo-control system, feed mechanism, shower nozzle and workbench, described servo-control system comprises servo longitudinal mechanism, horizontal servo control mechanism and vertical servo control mechanism, described feed mechanism links to each other with shower nozzle, described shower nozzle links to each other with horizontal servo control mechanism, it is characterized in that: described shower nozzle is the screw extrusion shower nozzle, described institute screw extrusion shower nozzle comprises stepper motor, by described stepper motor driven screw rod, heater and nozzle, the vertical servo control mechanism control worktable lifting of described servo-control system.
2. the desk-top fast forming machine of screw extrusion according to claim 1 is characterized in that: also be connected with the backing material shower nozzle on the described horizontal servo control mechanism.
3. the desk-top fast forming machine of screw extrusion according to claim 1 is characterized in that: the heater of described screw extrusion shower nozzle is an electrical bar.
4. the desk-top fast forming machine of screw extrusion according to claim 1 is characterized in that: the material of described nozzle is a copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053509 CN1586862A (en) | 2004-08-06 | 2004-08-06 | Crew extruding table type quick forming machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053509 CN1586862A (en) | 2004-08-06 | 2004-08-06 | Crew extruding table type quick forming machine |
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| Publication Number | Publication Date |
|---|---|
| CN1586862A true CN1586862A (en) | 2005-03-02 |
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ID=34602889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410053509 Pending CN1586862A (en) | 2004-08-06 | 2004-08-06 | Crew extruding table type quick forming machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103358689A (en) * | 2013-08-07 | 2013-10-23 | 苏州江南嘉捷机电技术研究院有限公司 | Multi-head three-dimensional printer |
| CN103752825A (en) * | 2013-12-31 | 2014-04-30 | 西安交通大学 | Device and method for utilizing molten metal deposition to form thin wall structural member |
| CN104175720A (en) * | 2013-05-28 | 2014-12-03 | 上海启培智能科技有限公司 | General 3D printer spray head |
| CN104441648A (en) * | 2013-09-23 | 2015-03-25 | 郑州乐彩科技股份有限公司 | Melting and laminating 3D (three dimensional) printer |
-
2004
- 2004-08-06 CN CN 200410053509 patent/CN1586862A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104175720A (en) * | 2013-05-28 | 2014-12-03 | 上海启培智能科技有限公司 | General 3D printer spray head |
| CN103358689A (en) * | 2013-08-07 | 2013-10-23 | 苏州江南嘉捷机电技术研究院有限公司 | Multi-head three-dimensional printer |
| CN104441648A (en) * | 2013-09-23 | 2015-03-25 | 郑州乐彩科技股份有限公司 | Melting and laminating 3D (three dimensional) printer |
| CN104441648B (en) * | 2013-09-23 | 2017-04-05 | 郑州乐彩科技股份有限公司 | A kind of melting stacking 3D printer |
| CN103752825A (en) * | 2013-12-31 | 2014-04-30 | 西安交通大学 | Device and method for utilizing molten metal deposition to form thin wall structural member |
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