CN1586865A - Quick forming screw extruding jet device for thermoplastic particle material - Google Patents
Quick forming screw extruding jet device for thermoplastic particle material Download PDFInfo
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- CN1586865A CN1586865A CNA200410067145XA CN200410067145A CN1586865A CN 1586865 A CN1586865 A CN 1586865A CN A200410067145X A CNA200410067145X A CN A200410067145XA CN 200410067145 A CN200410067145 A CN 200410067145A CN 1586865 A CN1586865 A CN 1586865A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/84—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders by heating or cooling the feeding screws
- B29C48/845—Heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/507—Screws characterised by the material or their manufacturing process
- B29C48/509—Materials, coating or lining therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The quick forming and screw extruding jet device for thermoplastic particle material belongs to the field of fast forming and smelting extrusion stacking technology in mechanical processing. The device includes push rod feeding mechanism, reducing worm gear transmission mechanism, micro extruding screw jet mechanism and temperature controlling heating mechanism. The push rod feeding mechanism consists of electromagnet, push rod and switching joint, and realizes the intermittent feeding of particle material via the reciprocation of the push rod notch between the material bin and material barrel. The present invention is a ideal smelting, extruding, stacking and forming jet device with effectively lowered cost, raised processing speed and less flow casting.
Description
Technical field
What the present invention relates to is a kind of quick shaping extruding jet device, and particularly a kind of quick forming screw extruding jet device that is used for thermoplastic particle material belongs to quick shaping melt extruded accumulation technology in the field of machining.
Background technology
RP technique is an emerging advanced manufacturing technology that grows up the eighties of last century later stage eighties, and it has many kinds of technology implementations.In the rapid forming system based on the melt extruded stack shaping, shower nozzle is a critical component of realizing stack shaping, and it and kinematic system are engaged in the orderly transfer of realization material under the CAD information-driven, and and then piles up bonding formation Three-dimensional Entity Components layer by layer.Therefore shower nozzle is the prerequisite and the core of melt extruded stack shaping.
In commercial at present quick building mortion, mainly contain fused deposition shaping (the Fused Deposition Modeling of U.S. Stratasys company based on the rapid prototyping machine of melt extruded stack shaping technology, abbreviation FDM) melted extrusion forming of series of products and Yin Hua company of enterprise group of Tsing-Hua University (Melted ExtrusionModelling is called for short MEM) product line.Therefore and formed with the shower nozzle technology of wire feed fluidized solid silk material pushing with the shower nozzle technology of wire feed liquefaction screw extrusion.
In existing technology, application number is that 98219118.9 patent is a kind of ejecting device of wire feed fluidized solid silk material pushing, it utilizes two (perhaps a plurality of) to drive the thermoplastic filaments material by the motor-driven friction roller of control, it is pushed in the copper pipe that remains on certain heating-up temperature, the silk material is in progradation, softening gradually, fusion, by the piston squeezing action of not molten silk material to fusing silk material, the silk material of viscous state is extruded from nozzle with certain speed, and prototype is shaped under certain process conditions.The advantage of this ejecting device is simple in structure, and is light and handy, can realize the wire feed of continous-stable and quantitatively extruding of fusion silk material, the reliability height.Weak point is that this device uses filamentary material, material cost height; Because the restriction of the anti-unstability ability of silk material made forming speed to improve between friction pulley carrying capacity and liquefied room entered the mouth to and take turns, extrusion capacity hourly only is 12 ~ 17 grams; Nozzle wire vent hysteresis and hydrostomia phenomenon can't overcome, and the forming quality of prototype is affected.Application number is that 02216588.6 patent is to adopt the ejecting device of wire feed liquefaction screw extrusion, it also is to drive the thermoplastic filaments material by friction pulley, it is pushed in the maintenance heating bend at a certain temperature, the silk material is in progradation, softening gradually, fusion by the squeezing action of molten silk material to fusing silk material, push the molten polymer of viscous state in the screw channel of extruding screw, utilize the spiral boosting effect, melting charge is extruded from nozzle.What this ejecting device can be realized the wire feed of continous-stable and fusing silk material quantitatively extrudes the reliability height.Because significantly reducing of the direct compressive region length of molten polymer makes the hydrostomia phenomenon be resolved basically; Owing to the fast response characteristic of screw rod, material is extruded and is responded soon, speed is high in addition.Weak point is that this ejecting device still uses filamentary material, the material cost height, and the breadth and depth of available material is restricted, and makes the prototype cost to reduce; Power Drive Unit on this shower nozzle increases to two present covers, that is: screw drive motor and friction pulley drive motors by a cover of traditional wire feed fluidized solid silk material pushing ejecting device simultaneously.This has just increased the weight of shower nozzle and the complexity of coupling control, shower nozzle manufacturing cost height.
Summary of the invention
For deficiency and the defective that overcomes prior art, the present invention has designed a kind of novel screw extruding jet device, is used for the quick shaping of graininess thermoplastic, polymeric materials.This device can reduce material cost effectively, improves prototype speed, reduces hydrostomia, is a kind of ejecting device of more satisfactory melt extruded stack shaping.
The screw extruding jet device that this use thermoplastic particle material is shaped from seeing that in essence being one can accurately control extrusion capacity, and makes the temperature of extruding a material keep within the specific limits miniature extruder.
The present invention includes the control motor, shaft coupling, connecting plate connects barrel, last machine barrel, following machine barrel, extruded segment temperature sensor, nozzle, the metering section temperature sensor, following heating collar, last heating collar, worm gear, worm screw, worm bearing, hopper, crossover sub, push rod, electromagnet, connect support, material level detecting sensor, extruding screw.Wherein, connect barrel, hopper, crossover sub, push rod, electromagnet connects support and material level detecting sensor and forms push-rod feeding mechanism; Shaft coupling, worm gear, worm screw and worm bearing are formed worm and gear one-level reduction gearing mechanism; Last machine barrel, following machine barrel, nozzle and extruding screw are formed miniature extruding screw shower head mechanism; The extruded segment temperature sensor, the metering section temperature sensor, following heating collar and last heating collar are formed the temperature control heating arrangements.The extruding screw epimere is the mounting portion, and hypomere is a spiral part.Wherein the mounting portion is by connecting axle, last transition axis, and round nut, the bearing and the shaft shoulder are formed, and bearing is fixed on the shaft shoulder of extruding screw by round nut; Spiral part is according to the specially designed three-section type spiral structure of thermoplastic extrusion characteristics, by following transition axis, and the feeding section, extruded segment, the metering section and the spiral vertex of a cone are formed.The footpath directly all remains unchanged at the bottom of the spiral of footpath and metering section at the bottom of the spiral of feeding section greater than footpath at the bottom of the spiral of feeding section at the bottom of the spiral of metering section, and the transition connection is realized from the feeding section to metering section by footpath, end even variation in the footpath at the bottom of the spiral of extruded segment.Connecting plate is a T template that the 90 ° of directions of turning right are placed, and all parts all are that benchmark carries out directly or indirectly installing with the connecting plate.The control motor is installed in the upper right side of connecting plate vertical panel, worm screw is fixed on the level board upper surface left side of connecting plate by a pair of worm bearing, the axis direction of worm screw is consistent with the axle core of control motor, and the output shaft of control motor 1 is connected with worm screw by shaft coupling.Extruding screw is packed into from the top of last machine barrel, the last machine barrel end cap that the center has circular hole is enclosed within on the extruding screw connecting axle, connecting axle stretches out from last machine barrel end cap central bore, compressing bearing by last machine barrel end cap is fixed in the machine barrel extruding screw, the outer surface of last machine barrel top boss is embedded in the level board middle part cylindrical hole of connecting plate and with soket head cap screw and is fastenedly connected, worm gear is installed on the connecting axle, and worm gear and worm screw are by giving extruding screw with transmission of power movingly.Following machine barrel is inserted in from the extruding screw bottom spiral vertex of a cone, uses the groove of screw and last machine barrel bottom surface to be connected the location by following machine barrel top boss.Nozzle is fixed on down the lower end of machine barrel by being threaded, the spiral vertex of a cone of extruding screw lower end stretches in the die cavity of nozzle.Last heating collar is installed in and the corresponding outer surface of machine barrel down of extruded segment, and the extruded segment temperature sensor is installed in the blind hole of the following machine barrel housing corresponding with last heating collar middle part, is used for detecting the temperature at extruded segment place.Following heating collar is installed in the outer surface with corresponding machine barrel down of metering section and nozzle, and the metering section temperature sensor is installed in the blind hole of nozzle outer surface, is used for detecting the extrusion temperature of metering section exit thermoplastic melt.Electromagnet is installed in the upper right side of connecting plate vertical panel side by side by link and control motor, crossover sub is installed in connecting plate vertical panel left side level board upper surface, the vertical panel that the axle core of electromagnet passes connecting plate connects with push rod, and push rod stretches in the cylindrical cavity of crossover sub.Hopper is fixed on the top of crossover sub, and the thermoplastic granulates material is contained in the hopper, and the material level detecting sensor is installed on the sidewall of hopper, is used for the The real time measure material level, and when material level was lower than the requirement height, hopper carried out auto feed.The crossover sub bottom is communicated with connecting barrel one end by the cylindrical hole on the connecting plate level board, connects the barrel other end and is connected with the corresponding inclined hole of going up the machine barrel side of extruding screw feeding section.Push rod can move back and forth by the shaft core direction along electromagnet in crossover sub, by the conversion connection effect of push rod the thermoplastic granulates material in the hopper is sent in the screw channel of extruding screw by control instruction by connecting barrel.This device is installed by the vertical panel Lower Half and the stationary table of connecting plate.
The concrete course of work of this device is that before starting working, hopper carries out auto feed.During work, the thermoplastic granulates material of feed hopper bottom is deposited in the groove of push rod under the gravity effect, the electromagnet energising, the driving push rod travels forward, when the shaft shoulder of push rod during with the contacts side surfaces of crossover sub, the push rod stop motion of being obstructed, the groove of push rod just in time move to the porch that connects barrel, and the thermoplastic granulates material in being trapped in the groove enters under the gravity effect and connects in the barrel.By the energising power-off time interval of control electromagnet, can regulate the amount of feeding of thermoplastic granulates material.
Entering the thermoplastic granulates material that connects barrel slips in the screw channel of extruding screw feeding section automatically along the barrel that connects barrel, under the effect of screw extrusion power, move downward along screw channel, in the extruding screw extruded segment, be compressed and carry downwards, under last heating collar and the common heat effect of following heating collar, softening gradually, semi-molten, fusion, through the abundant mixing stirring action of screw metering section, last fusion homogeneous polymer is quantitatively extruded from nozzle.
Pile up shower nozzle with existing melt extruded and compare, the present invention has following significant advantage:
(1) avoids having the preparation of certain diameter silk material, widened the range of choice of moulding material, can select the suitable moulding material that comprises thermoplastic elastomer (TPE) easily and flexibly;
(2) can improve the extruded velocity of material effectively, pile up the part prototype quickly from nozzle;
(3) be shaped and be not subjected to the restriction of material melt viscosity, can adopt the higher viscosity of extruding, freely select engineering thermoplasties's entity component that is shaped;
(4) can use the littler nozzle of diameter, reduce the cross-sectional area of extruded material, obtain better resolution ratio, make the prototype local detail more clear;
(5) existing wire feed liquefaction extrusion mechanism can not fully adapt to the required high pressure of melt-shaping, the high speed material flows and pressure at a high speed changes three's combination, and screw extrusion machinery can make the three obtain good combination;
(6), can reduce " hydrostomia " phenomenon effectively for the little thermoplastic of viscosity;
(7) with respect to traditional mechanism, it is effective that screw rod is extruded the wire vent start-stop of shower nozzle shaping nozzle.
(8) from a structural point, this shower nozzle has compact conformation, uses reliably characteristics with low cost, that forming speed is high.
Description of drawings
Fig. 1 screw extruding jet device structure principle chart of the present invention;
Fig. 2 thermoplastic particle push-rod feeding mechanism schematic diagram;
Fig. 3 is an extruding screw structural representation of the present invention;
Fig. 4 is a screw extruding jet device profile schematic diagram of the present invention;
The specific embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, the present invention includes control motor 1, shaft coupling 2, connecting plate 3, connect barrel 4, last machine barrel 6, following machine barrel 7, extruded segment temperature sensor 8, nozzle 9, metering section temperature sensor 10, following heating collar 11, last heating collar 12, worm gear 14, worm screw 15, worm bearing 16, hopper 17, crossover sub 18, push rod 19, electromagnet 20, connect support 21, material level detecting sensor 22, extruding screw 23.Wherein, connect barrel 4, hopper 17, crossover sub 18, push rod 19, electromagnet 20 connects support 21 and material level detecting sensor 22 is formed push-rod feeding mechanism; Shaft coupling 2, worm gear 14, worm screw 15 and worm bearing 16 are formed worm and gear one-level reduction gearing mechanism; Last machine barrel 6, following machine barrel 7, nozzle 9 and extruding screw 23 are formed miniature extruding screw shower head mechanism; Extruded segment temperature sensor 8, metering section temperature sensor 10, following heating collar 11 and last heating collar 12 are formed the temperature control heating arrangements.Extruding screw 23 epimeres are the mounting portion, and hypomere is a spiral part.Wherein the mounting portion is by connecting axle 25, last transition axis 26, and round nut 27, the bearing 13 and the shaft shoulder 28 are formed, and bearing 13 is fixed on the shaft shoulder 28 of extruding screw 23 by round nut 27; Spiral part is according to the specially designed three-section type spiral structure of thermoplastic extrusion characteristics, by following transition axis 29, and feeding section 30, extruded segment 31, the metering section 32 and the spiral vertex of a cone 33 are formed.The footpath is greater than footpath at the bottom of the spiral of feeding section 30 at the bottom of the spiral of metering section 32, at the bottom of the spiral of feeding section 30 at the bottom of the footpath and the spiral of metering section 32 footpath all remain unchanged, the transition connection 32 is realized by footpath, end even variation from feeding section 30 to metering section in the footpath at the bottom of the spiral of extruded segment 31.Connecting plate 3 is the T templates that the 90 ° of directions of turning right are placed, and all parts are that benchmark carries out directly or indirectly installing with connecting plate 3 all.Control motor 1 is installed in the upper right side of connecting plate 3 vertical panels, worm screw 15 is fixed on the level board upper surface left side of connecting plate 3 by a pair of worm bearing 16, the axis direction of worm screw 15 is consistent with the axle core of control motor 1, the output shaft of control motor 1 is connected with worm screw 15 by shaft coupling 2, during installation, the axiality of worm screw 15 and control motor 1 output shaft is in φ 0.03mm scope.Extruding screw 23 is packed into from the top of last machine barrel 6, the last machine barrel end cap that the center has circular hole is enclosed within on the extruding screw connecting axle 25, connecting axle 25 stretches out from last machine barrel end cap central bore, compressing bearing 13 by last machine barrel end cap is fixed in the machine barrel 6 extruding screw 23, the outer surface of last machine barrel 6 top boss is embedded in the level board middle part cylindrical hole of connecting plate 3, and be fastenedly connected with soket head cap screw 24, worm gear 14 is installed on the connecting axle 25, and worm gear 14 and worm screw 15 are by giving extruding screw 23 with transmission of power movingly.Following machine barrel 7 is inserted in from the extruding screw 23 bottom spiral vertex of a cones 33, uses the groove of screw and last machine barrel 6 bottom surfaces to be connected the location by following machine barrel 7 top boss.Nozzle 9 is fixed on down the lower end of machine barrel 7 by being threaded, the spiral vertex of a cone 33 of extruding screw 23 lower ends stretches in the die cavity of nozzle 9.Last heating collar 12 is installed in and the extruded segment 31 corresponding outer surfaces of machine barrel 7 down, and extruded segment temperature sensor 8 is installed in the blind hole of following machine barrel 7 housings corresponding with last heating collar middle part, is used for detecting the temperature at extruded segment 31 places.Following heating collar 11 is installed in the outer surface with metering section 33 corresponding machine barrels 7 down and nozzle 9, and metering section temperature sensor 10 is installed in the blind hole of nozzle 9 outer surfaces, is used for detecting the extrusion temperature of metering section 33 exit thermoplastic melt.Electromagnet 20 is installed in the upper right side of connecting plate 3 vertical panels side by side by link 21 and control motor 1, crossover sub 18 is installed in the vertical panel left side level board upper surface of connecting plate 3, the vertical panel that the axle core of electromagnet 20 passes connecting plate 3 connects with push rod 19, and push rod 19 stretches in the cylindrical cavity of crossover sub 18.Hopper 17 is fixed on the top of crossover sub 18, and thermoplastic granulates material 5 is contained in the hopper 17, and material level detecting sensor 22 is installed on the sidewall of hopper 17, is used for the The real time measure material level, and when material level was lower than the requirement height, hopper 17 carried out auto feed.Crossover sub 18 bottoms are communicated with connecting barrel 4 one ends by the cylindrical hole on connecting plate 3 level boards, connect barrel 4 other ends and are connected with the extruding screw feeding section 30 corresponding inclined holes of going up machine barrel 6 sides.Push rod 19 can move back and forth by the shaft core direction along electromagnet 20 in crossover sub 18, by the conversion connection effect of push rod 19 the thermoplastic granulates material 5 in the hopper 17 is sent in the screw channel of extruding screw 23 by control instruction by connecting barrel 4.This device is installed by the vertical panel Lower Half and the stationary table of connecting plate 3.
The concrete course of work of this device is that before starting working, hopper 17 carries out auto feed.During work, the thermoplastic granulates material 5 of hopper 17 bottoms is deposited in the groove of push rod 19 under the gravity effect, electromagnet 20 energisings, driving push rod 19 travels forward, when the shaft shoulder of push rod 19 during with the contacts side surfaces of crossover sub 18, push rod 19 stop motion of being obstructed, the groove of push rod 19 just in time move to the porch that connects barrel 4, and the thermoplastic granulates material 5 in being trapped in the groove enters under the gravity effect and connects in the barrel 4.By the energising power-off time interval of control electromagnet 20, can regulate the amount of feeding of thermoplastic granulates material 5.
Entering the thermoplastic granulates material 5 that connects barrel 4 slips in the screw channel of extruding screw feeding section 30 automatically along the barrel that connects barrel 4, under the effect of screw extrusion power, move downward along screw channel, in extruding screw extruded segment 31, be compressed and carry downwards, under last heating collar 12 and following heating collar 11 common heat effects, softening gradually, semi-molten, fusion, through the abundant mixing stirring action of screw metering section 32, last fusion homogeneous polymer is quantitatively extruded from nozzle 9.Generally speaking, in order to form reliable and stable extrusion pressure, the temperature at extruded segment 31 places will be hanged down 30～40 ℃ than the extrusion temperature at metering section 32 places.
The transmission of extruding screw 23 is the worm and gear first class reducer structures that adopt little modulus big speed ratio, the power of control motor 1 is through shaft coupling 2, worm gear 14 worm screws 15 are delivered on the extruding screw 23, and the size of shower nozzle extruded velocity is to realize by the rotating speed of control motor 1.
Extruding screw 23 adopts 40Cr material modulation treatment, external diameter is 12～15mm, uniform pitch, helical angle is 14 °～18 °, the length of feeding section 30 is 32～38mm, and the length of compression section 31 is 45～51mm, metering section 32 length 38～45mm, spiral groove depth is 1.5～3.5mm, and surface roughness is Ra0.4～0.8.
Claims (8)
1. the quick forming screw extruding jet device of a thermoplastic particle material comprises control motor (1), shaft coupling (2), nozzle (9), bearing (13), spiro rod support (16), extruding screw (23) is characterized in that also comprising connecting plate (3), connects barrel (4), last machine barrel (6), following machine barrel (7), extruded segment temperature sensor (8), metering section temperature sensor (10), following heating collar (11), last heating collar (12), worm gear (14), worm screw (15), hopper (17), crossover sub (18), push rod (19), electromagnet (20), connect support (21) and material level detecting sensor (22), extruding screw (23) epimere is the mounting portion, and hypomere is a spiral part, wherein the mounting portion is by connecting axle (25), last transition axis (26), round nut (27), the bearing (13) and the shaft shoulder (28) are formed; Spiral part is by following transition axis (29), feeding section (30), extruded segment (31), the metering section (32) and the spiral vertex of a cone (33) are formed, connecting plate (3) is a T template that the 90 ° of directions of turning right are placed, all parts are that benchmark carries out directly or indirectly installing with connecting plate (3) all, control motor (1) is installed in the upper right side of connecting plate (3) vertical panel, worm screw (15) is fixed on the level board upper surface left side of connecting plate (3) by a pair of worm bearing (16), the axis direction of worm screw (15) is consistent with the axle core of control motor (1), the output shaft of control motor (1) is connected with worm screw (15) by shaft coupling (2), bearing (13) is fixed on the shaft shoulder (28) of extruding screw (23) by round nut (27), extruding screw (23) is packed into from the top of last machine barrel (6), the last machine barrel end cap that the center has circular hole is enclosed within on the extruding screw connecting axle (25), connecting axle (25) stretches out from last machine barrel end cap central bore, compressing bearing (13) by last machine barrel end cap is fixed in the machine barrel (6) extruding screw (23), the outer surface of last machine barrel (6) top boss is embedded in the level board middle part cylindrical hole of connecting plate (3) and is fastenedly connected with soket head cap screw (24), worm gear (14) is installed on the connecting axle (25), following machine barrel (7) is inserted in from extruding screw (23) the bottom spiral vertex of a cone (33), use the groove of screw and last machine barrel (6) bottom surface to be connected the location by following machine barrel (7) top boss, nozzle (9) is fixed on down the lower end of machine barrel (7) by being threaded, the spiral vertex of a cone (33) of extruding screw (23) lower end stretches in the die cavity of nozzle (9), last heating collar (12) is installed in and the corresponding outer surface of machine barrel (7) down of extruded segment (31), extruded segment temperature sensor (8) is installed in the blind hole of following machine barrel (7) housing corresponding with last heating collar middle part, following heating collar (11) is installed in the outer surface with corresponding following machine barrel (7) of metering section (33) and nozzle (9), metering section temperature sensor (10) is installed in the blind hole of nozzle (9) outer surface, electromagnet (20) is installed in the upper right side of connecting plate (3) vertical panel side by side by link (21) and control motor (1), crossover sub (18) is installed in the level board upper surface in connecting plate (3) vertical panel left side, the same push rod of vertical panel (19) that the axle core of electromagnet (20) passes connecting plate (3) connects, push rod (19) stretches in the cylindrical cavity of crossover sub (18), hopper (17) is fixed on the top of crossover sub (18), thermoplastic granulates material (5) is contained in the hopper (17), material level detecting sensor (22) is installed on the sidewall of hopper (17), crossover sub (18) bottom is communicated with connecting barrel (4) one ends by the cylindrical hole on connecting plate (3) level board, connecting barrel (4) other end is connected with the corresponding inclined hole of going up machine barrel (6) side of extruding screw feeding section (30), push rod (19) can move back and forth by the shaft core direction along electromagnet (20) in crossover sub (18), and this device is installed by the vertical panel Lower Half and the stationary table of connecting plate (3).
2. the quick forming screw extruding jet device of thermoplastic particle material according to claim 1, the spiral part that it is characterized in that described extruding screw (23) is according to the specially designed three stage structure of thermoplastic extrusion characteristics, the footpath is greater than footpath at the bottom of the spiral of feeding section (30) at the bottom of the spiral of metering section (32), directly all remain unchanged at the bottom of the spiral of footpath and metering section (32) at the bottom of the spiral of feeding section (30), the transition connection is realized from feeding section (30) to metering section (32) by footpath, end even variation in the footpath at the bottom of the spiral of extruded segment (31).
3. the quick forming screw extruding jet device of thermoplastic particle material according to claim 1, the transmission that it is characterized in that described extruding screw (23) is the worm and gear one-level reduction gearing mechanism that adopts little modulus big speed ratio, the power of control motor (1) is through shaft coupling (2), worm gear (14), worm screw (15), be delivered on the extruding screw (23), the size of shower nozzle extruded velocity is to realize by the rotating speed of control motor (1).
4. the quick forming screw extruding jet device of thermoplastic particle material according to claim 1, it is characterized in that described extruding screw (23) is to adopt 40Cr material modulation treatment, external diameter is 12～15mm, uniform pitch, helical angle are 14 °～18 °, and the length of feeding section (30) is 32～38mm, the length of compression section (31) is 45～51mm, metering section (32) length 38～45mm, spiral groove depth is 1.5～3.5mm, surface roughness is Ra0.4～0.8.
5. the quick forming screw extruding jet device of thermoplastic particle material according to claim 1, it is characterized in that described upward machine barrel (5) and following machine barrel (6) are to adopt 45 steel modulation treatment, last machine barrel (5) length is 65～75mm, and following machine barrel (6) length is 105～115mm.
6. the quick forming screw extruding jet device of thermoplastic particle material according to claim 1, it is characterized in that described control motor (1) is to adopt U2M057 type stepper motor, last heating collar (12) and following heating collar (11) all adopt the cast copper heater, extruded segment temperature sensor (8) and metering section temperature sensor (10) all adopt the Pt100 thermal resistance, nozzle (9) adopts the brass material manufacturing, and the jet expansion diameter is 0.3mm.
7. the quick forming screw extruding jet device of thermoplastic particle material according to claim 1, it is characterized in that described push rod (19) is to adopt LY12 type aluminum alloy materials, diameter is 8～12mm, and electromagnet (20) model is SDO-1240S-12A14.4.
8. the quick forming screw extruding jet device of thermoplastic particle material according to claim 1, the axiality that it is characterized in that described worm screw (15) and control motor (1) output shaft is in φ 0.03mm scope.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410067145XA CN100488751C (en) | 2004-10-14 | 2004-10-14 | Quick forming screw extruding jet device for thermoplastic particle material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410067145XA CN100488751C (en) | 2004-10-14 | 2004-10-14 | Quick forming screw extruding jet device for thermoplastic particle material |
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| CN1586865A true CN1586865A (en) | 2005-03-02 |
| CN100488751C CN100488751C (en) | 2009-05-20 |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100358709C (en) * | 2005-12-26 | 2008-01-02 | 西北工业大学 | Super plasticity extruding and forming device for micro parts |
| CN101850603A (en) * | 2010-04-30 | 2010-10-06 | 三斯达(福建)塑胶有限公司 | Main-machine screw rod of EVA (Ethylene Vinyl Acetate) leftover material plasticizing and granulating device |
| CN1939695B (en) * | 2005-09-28 | 2012-11-14 | 柯尼卡美能达精密光学株式会社 | Injection molding machine |
| CN103660234A (en) * | 2013-12-30 | 2014-03-26 | 广东联塑机器制造有限公司 | Single-screw extruder |
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| CN1939695B (en) * | 2005-09-28 | 2012-11-14 | 柯尼卡美能达精密光学株式会社 | Injection molding machine |
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| CN112622228A (en) * | 2020-12-30 | 2021-04-09 | 重庆瑞霆塑胶有限公司 | Extrusion device of co-extrusion film blowing machine |
| CN112622228B (en) * | 2020-12-30 | 2022-11-25 | 重庆瑞霆塑胶有限公司 | Extrusion device of co-extrusion film blowing machine |
| CN113215665A (en) * | 2021-07-09 | 2021-08-06 | 江苏柏琳家用纺织品有限公司 | Spinning device for producing high-strength nylon yarns |
| CN114407346A (en) * | 2022-01-07 | 2022-04-29 | 西北工业大学 | Forming spray head and additive manufacturing equipment |
| CN115648380A (en) * | 2022-11-14 | 2023-01-31 | 天津科技大学 | Be used for many materials 3D to print double screw extrusion mechanism |
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