CN204295997U - The material-spraying device of extruder - Google Patents

Abstract

This technology provide a kind of can the feeding feed bin of material dosing, operating efficiency is high, structure is simple, easy to use extruder material-spraying device.It comprises sleeve (31), nozzle (32), material spray drive unit (33); Sleeve one end communicates with the nozzle stretched in feed bin, and there is piston (34) other end inside; Piston is connected with its material spray drive unit moved back and forth of drive; The material inlet communicated with barrel bore is had on sleeve wall top.

Description

The material-spraying device of extruder

Technical field

This technology relates to the feeding device of plastic pipe extruder, particularly the feeding device being prepared into the vertical extruder of tubing after PTFE powder pressurized, heated.

Background technology

PTFE tube material extruder generally comprises the external mold 11 having centre bore, core 12 on fixed frame; Core passes from the centre bore of external mold, forms die cavity 13 between core and external mold centre bore; Die cavity comprises the extruded segment 131 of epimere and the profiled section 132 of hypomere; To the induction heater 14 that external mold heats after the external mold periphery of profiled section part is arranged; Above die cavity, have the pressing mold 15 being slidably arranged in core periphery, pressing mold and the main drive 16 driving pressing mold to slide along core up and down and pass in and out extruded segment are connected.In order to material is sent into feed bin, the artificial feeding of general employing, feeding amount is difficult to metering, and labour intensity is also large.

Utility model content

The object of this technology be to provide a kind of can the feeding feed bin of material dosing, operating efficiency is high, structure is simple, easy to use extruder material-spraying device.

The material-spraying device of the extruder described in this technology, comprises sleeve 31, nozzle 32, material spray drive unit 33; Sleeve one end communicates with the nozzle stretched in feed bin, and there is piston 34 other end inside; Piston is connected with its material spray drive unit moved back and forth of drive; The material inlet communicated with barrel bore is had on sleeve wall top.

The utility model beneficial effect: be certain substantially due to what entered the amount of the material in sleeve by material inlet, so piston once moves back and forth, the amount sending into the material in feed bin is also substantially certain, which achieves automatic gauge feeding.If need the amount changing the material entered in feed bin, the frequency moved back and forth of piston can be changed, or change the internal diameter of sleeve.

The material-spraying device of above-mentioned extruder, it also comprises pay-off material being sent into material inlet; Described pay-off comprises a broach hopper 41, the shaft 42 rotated under the drive of mixer drive be positioned on broach hopper axis, shaft is arranged stirring vane 43; The outlet of broach hopper connects material inlet; The upper end of broach hopper has material inlet.Like this, first send into material inlet by pay-off stimulating food material, then through material-spraying device, material is sent into feed bin, further achieve the automation of feeding.

The material-spraying device of above-mentioned extruder, material spray drive unit is cylinder.Cylinder is swift in motion, and efficiency is high.

Accompanying drawing explanation

Fig. 1 is the stereogram of vertical extruder.

Fig. 2 is the sectional view of vertical extruder.

Fig. 3 is the annexation schematic diagram relatively such as base, cope match-plate pattern, lower bolster, master cylinder, pay-off.

Fig. 4 is the annexation schematic diagram relatively such as cope match-plate pattern, master cylinder, auxiliary oil cylinder, sleiding form, pay-off.

Fig. 5 is the annexation schematic diagram relatively such as lower bolster, core, external mold, base.

Fig. 6 is the annexation schematic diagram (omitting gear wheel, lower gear, material scraping plate etc.) relatively such as base, cope match-plate pattern, lower bolster, core, external mold, positioning sleeve.

Fig. 7 is the stereogram of gear wheel, lower gear, material scraping plate, back-up ring etc.

Fig. 8 is the relative annexation schematic diagram of gear wheel, lower gear, material scraping plate, back-up ring, cooler pan etc.

Fig. 9 is the top view of Fig. 8.

Figure 10 is the B-B sectional view of Fig. 8.

Figure 11 is the schematic diagram of pay-off.

Figure 12 is the annexation schematic diagrames such as sleeve, nozzle, piston.

Figure 13 is core and the relative annexation schematic diagram of cooling duct, cooling water inlet pipe, cooling water outlet tube etc.

In figure, base and mold frame components 1, core cooling device 2, measure material-spraying device 3, pay-off 4, transmission stirring device 5;

External mold 11, core 12(comprise core 1201, connect plug 1202, lower core 1203), die cavity 13(comprises cavity 133, extruded segment 131, profiled section 132); Induction heater 14, pressing mold 15, main drive (Master cylinder body) 16, Master cylinder body 161, main piston rod 162, feed bin 17, material scraping plate 18.Scraper servomotor 19, gear wheel 110, annular table terrace 1101, pinion 111, connecting plate 112, the conical surface 113, guide pillar 114, sleiding form 115, cope match-plate pattern 116, lower bolster 117, under connect dish 118, flange 119, positioning sleeve 120, fillet 12001, positioning sleeve upper surface 12002, cooler pan 121, cooling chamber 1211, water inlet pipe 1212, outlet pipe 1213 communicates, refrigerating seat 122, water cavity 1221, base 123, little axle 124, bearing 125, tie-plate 126, positioning disk 127, screw thread connects dish 128, back-up ring 129, auxiliary oil cylinder (core driving mechanism) 6, subsidiary cylinder 61, auxiliary piston bar 62,

Bottom cooling duct 21, cooling duct 211, top, cooling duct 212, cooling water inlet pipe 22, cooling water outlet tube 23;

Sleeve 31, nozzle 32, cylinder (material spray drive unit) 33, piston 34, material inlet 35;

Broach hopper 41, shaft 42, stirring vane 43, stirring motor (mixer drive) 44, inlet pipe 45, hopper outlet 46.

Detailed description of the invention

Vertical extruder shown in Figure 1, it comprises base and mold frame components 1, core cooling device 2, measures material-spraying device 3, pay-off 4, transmission stirring device 5.

Base comprises base 123 with mold frame components 1, the lower bolster (being equivalent to frame) 117 be arranged on base, guide pillar 114, sleiding form 115, cope match-plate pattern 116, the external mold 11 having centre bore, core 12(comprise upper core 1201, connect plug 1202, lower core 1203), master cylinder (main drive) 16, auxiliary oil cylinder (core driving mechanism) 6 etc.

Core passes from the centre bore of external mold, forms die cavity 13 between core and external mold centre bore; Die cavity comprises the extruded segment 131 of epimere and the profiled section 132 of hypomere; To the induction heater 14 that external mold heats after the external mold periphery of profiled section part is arranged.Lower bolster is provided with under having endoporus and connects dish 118, be connected in endoporus positioning sleeve 120; External mold upper end is connected with flange 119 by screw thread pair; Flange 119 with under connect dish lower surface be connected; Positioning sleeve 120 lower end and the groove fit opened in external mold upper surface; Positioning sleeve has the axis hole equal with center hole size; The joint of axis hole and positioning sleeve upper surface 12002 is fillet 12001.Mandrel also and axis hole forms cavity 133 through the axis hole on positioning sleeve; Described cavity 133 docks with extruded segment 131.Certainly, positioning sleeve can regard a part for external mold as, and cavity 133 also can regard a part for extruded segment as.

Lower bolster arranges four guide pillars 114 parallel with mandrel, and what sleiding form 115 slided is arranged on guide pillar.Guide pillar upper end arranges cope match-plate pattern 116.The pressing mold 15 being slidably arranged in core periphery is provided with above die cavity, pressing mold is fixed on tie-plate 126, tie-plate 126 and positioning disk 127 are located in radial fit and are connected with positioning disk, and positioning disk 127 is located in radial to coordinate with sleiding form and connects with sleiding form lower end.The main drive 16 driving sleiding form, pressing mold etc. to pass in and out extruded segment up and down along core slip is master cylinder, and the Master cylinder body 161 of master cylinder is arranged on cope match-plate pattern top; Lower end and the screw thread of the main piston rod 162 of master cylinder connect dish 128 and are connected, and screw thread connects dish 128 and is connected with sleiding form 115 upper end.Core is upward through main piston rod and is connected with Master cylinder body.

The subsidiary cylinder 61 of auxiliary oil cylinder 6 is fixed on Master cylinder body 161, and core upper end is connected with the auxiliary piston bar 62 of auxiliary oil cylinder through main piston rod.Auxiliary oil cylinder 6 action, drives core to move at axis direction.

Positioning sleeve upper end outstanding with under connect dish, at positioning sleeve upper periphery, cooler pan 121 is set, the lower surface of cooler pan 121 with under connect dish upper surface contact.Have the cooling chamber 1211 passing to cooling water in cooler pan, cooling chamber communicates with water inlet pipe 1212, outlet pipe 1213 respectively.The peripheral upper portion of cooler pan fixes back-up ring 129; Described feed bin 17 is formed between the upper surface of cooler pan, the upper surface 12002 of positioning sleeve, back-up ring 129 inner circumferential; The conical surface 113 low centered by the bottom of feed bin, periphery is high.

Transmission stirring device 5 mainly comprises scraper servomotor 19, pinion 111, gear wheel 110, material scraping plate 18.Gear wheel 110 is coaxial with mandrel, lower bolster is evenly equipped with three little axles 124 along gear wheel circumference, little axle is arranged bearing 125.Bottom, gear wheel 110 periphery has annular table terrace 1101, the end face of step surface and side respectively with end face and the contacts side surfaces of bearing, thus gear wheel 110 can be rotated around mandrel axis.Scraper servomotor (scraper drive unit) 19 is fixed on cope match-plate pattern, and the pinion 111 engaged with gear wheel is arranged on the output shaft of scraper servomotor 19; Material scraping plate 18 is positioned at bin bottom, and is connected with gear wheel by the connecting plate 112 striden across above back-up ring.Material scraping plate rotates around core axis and the material in feed bin is sent into die cavity under the drive of scraper servomotor 19.

What under being positioned at, connect dish periphery is connected with refrigerating seat 122 on lower bolster lower surface, has the water cavity 1221 passing to cooling water in refrigerating seat.

Core cooling device 2 mainly comprises cooling duct 21, cooling water inlet pipe 22 and cooling water outlet tube 23.In core, have cooling duct 21 vertically, cooling duct extends downward in the core corresponding with extruded segment from core upper end; One cooling water inlet pipe 22 extend in cooling duct and 211 to communicate with bottom cooling duct, and cooling water outlet tube 23 communicates with top, cooling duct 212.

The metering material-spraying device 3 that material sprays in feed bin is mainly comprised sleeve 31, nozzle 32, cylinder (material spray drive unit) 33; The sleeve one end be fixed in frame communicates with the nozzle stretched in feed bin, and there is piston 34 other end inside; Piston and its cylinders moved back and forth of drive; The material inlet 35 communicated with barrel bore is had on sleeve wall top.

Material is sent into the pay-off 4 of material inlet mainly comprises a broach hopper 41, the shaft 42 rotated under the drive of stirring motor (mixer drive) 44 be positioned on broach hopper axis, shaft is arranged stirring vane 43; Hopper outlet 46 bottom broach hopper connects material inlet 35; The upper end of broach hopper is connected with the inlet pipe 45 of input material.

The advantage of this vertical extruder:

Compact conformation.The more important thing is, while pressing mold moves down, core moves up, and pressing mold applies downward active force to material, and core applies active force upwards to material, ensure that the material in die cavity is reliably extruded.Then be positioned at minimum point at pressing mold, keep a period of time when core is positioned at peak, material is extruded substantially, and (mold pressing) is shaping; Then pressing mold moves up again, core moves down again, substantially can not impact by the material shaping to (mold pressing).

The rotation of material scraping plate, can also ensure that material in feed bin is in the circumferential direction centered by core axis, material thickness is basically identical, thus ensures the material uniformity in circumferential direction that enters in die cavity.

Sleiding form 115, cope match-plate pattern 116 and lower bolster 117 are co-located on column, easily ensure the axiality of external mold, core rod, arrange the guide pillar led to the slip of sleiding form 115, ensure that pressing mold moves along core axis.

Adopt master cylinder as main drive, pressure is large, and core rod is through hollow piston rod, and complete machine structure is simple simultaneously.

External mold by flange, positioning sleeve, under connect the structure that dish etc. is connected with lower bolster, especially by positioning sleeve, radial location is carried out to external mold, simultaneously positioning sleeve with under connect and coil inner hole and be connected and carry out radial location, be more prone to the axiality of guarantee external mold and core.

The structure that pressing mold is connected with sleiding form by tie-plate, positioning disk etc., to pressing mold accurate positioning, easily ensures the axiality of pressing mold and core.

Cooling medium (as cooling water) pass into respectively cooling chamber 1211, water cavity 1221,21 pairs, cooling duct positioning sleeve, under connect dish, lower bolster, core etc. and cool.Adopt the cooler pan that passes to cooling water to positioning sleeve and under connect dish and carry out cooling down, ensure that the reliably working of positioning sleeve.Meanwhile, cooler pan and back-up ring, positioning sleeve form feed bin jointly, and structure is simpler.The conical surface low centered by the bottom of feed bin, periphery is high.Like this, powder is from easily entering the die cavity being positioned at center.Adopt the cooling duct pair plug portion corresponding with extruded segment passing to cooling water to divide and carry out cooling down, ensure that the reliably working with core.

The joint of the upper surface of axis hole and positioning sleeve is fillet, makes material more easily slip into die cavity.

Material-spraying device achieves automatic gauge feeding.Pay-off further achieves the automation of feeding.

During use, PTFE powder enters hopper through material inlet, stirring through shaft arrives the material inlet be positioned on sleeve of hopper bottom, piston is driven to move through cylinder, a certain amount of material enters in feed bin from through nozzle, and drive material scraping plate to rotate by scraper servomotor through pinion, gear wheel, powder enters in die cavity, then master cylinder drives sleiding form, pressing mold etc. to move down from initial position, and material in die cavity is pressed down; While pressing mold moves down, auxiliary oil cylinder drives core to move up from original position; When pressing mold is moved down into minimum point, core moves to peak, keeps this state a period of time; Master cylinder drives pressing mold to move up again and leaves die cavity and get back to initial position, and auxiliary oil cylinder drives core to move down and gets back to original position; The material scraping plate rotated is scraped powder into die cavity again, pressing mold is moved down into minimum point from initial position again, and core is moved upwards up to peak from original position again, then after keeping a period of time, pressing mold moves up and gets back to initial position, and core moves down and gets back to original position; So repeatedly, enter die cavity and material after being extruded enters into profiled section from extruded segment gradually, lower the temperature gradually again after profiled section is heated to form molten state, then shaping, from profiled section out, complete the preparation of tubing.The feeding of this equipment collection, extruding, hot briquetting forms one, production efficiency is high.

Claims (3)

1. the material-spraying device of extruder, is characterized in that: comprise sleeve (31), nozzle (32), material spray drive unit (33); Sleeve one end communicates with the nozzle stretched in feed bin, and there is piston (34) other end inside; Piston is connected with its material spray drive unit moved back and forth of drive; The material inlet communicated with barrel bore is had on sleeve wall top.

2. material-spraying device as claimed in claim 1, it is characterized in that: further comprising pay-off material being sent into material inlet; Described pay-off comprises a broach hopper (41), the shaft (42) rotated under the drive of mixer drive be positioned on broach hopper axis, shaft is arranged stirring vane (43); The outlet of broach hopper connects material inlet; The upper end of broach hopper has material inlet.

3. material-spraying device as claimed in claim 1, is characterized in that: material spray drive unit is cylinder.