CN102729446A - Linkage production method and device for rubber hose extrusion - Google Patents

Abstract

The present invention relates to a linkage production method and a device for rubber hose extrusion. The device includes a soft core guiding device, a front traction machine, a cold feed extruder, a power counter, a temperature control system, a diameter gauge, a printer, a cooling water device, a rear traction machine, a separant coating machine, a double-shaft winding machine, a main console and a tension adjusting device. The extruder is provided with multiple groups of cylinder heaters, temperature detectors and pressure sensors. A control system of the extruder is composed of a frequency converter, a PLC, a hose length detection rotary encoder and a hose wall thickness tester; and the control system of the extruder has the following functions: manual and automatic conversion; selection, identification and input of set reference value; automatic tracking and adjustment on traction speed according to thickness deviation of the hose wall; display and set of the wall thickness of the hose; display of the current and speed of the traction machine; protection, alarm and self fault diagnosis mechanical and electrical components for overcurrent, overvoltage, traction claw slip, broken chain traction and broken shaft traction. The technical scheme disclosed by the invention has the characteristics of high automation degree and convenience for operation and use, etc.

Description

A kind of sebific duct extrusion linkage production method and device thereof

Technical field

The present invention relates to a kind of sebific duct extruding technology, specifically relate to the cold feeding extrusion linkage production line of a kind of sebific duct.

Background technology

1, extrusion equipment

Extruding is very important technical process in the hose manufacturing process, sizing material through extruder plasticizing, mixing and extrude through the corresponding shape of the mouth as one speaks after, just can obtain the pipe of corresponding specification.Extruder is divided into hot-feed extruder and cold feed extruder according to the difference of feeding manner.At present, most domestic sebific duct manufacturer uses the not hot-feed extruder extruding pipe embryo of apposition, has only minority producer with cold feed extruder extruding pipe embryo.Use hot feeding to extrude sebific duct pipe embryo, must be equipped with rubber mixing machine sizing material is refined, and the sizing material heat refining must be evenly.Adopt cold feeding to extrude sebific duct; Sizing material before extruding need not pass through the heat refining worker; And directly with in the cold glue bar feeding extruder spout; Thereby avoid sizing material before extruding, to bring quality fluctuation because of the inequality of being heated during preheating, have more simultaneously and simplify production technology, reduce and establish investment, enhance productivity, save advantage such as the energy, should adopt and widely popularize.

More advanced sebific duct extruding production line should comprise extruder and head, caliper, bosh, interleaving agent spray equipment, draw-gear and devices for taking-up etc.At present, most of producer sebific duct extruding production line structure is simpler and easy, is not equipped with special-purpose draw-gear, only relies on the artificial traction of operator sebific duct pipe embryo.The draw-gear unreasonable structure that some producer is equipped with, control accuracy is too low, has realized not the precision control to hauling speed and extruded velocity.Be equipped with caliper on the advanced sebific duct extruding production line pipe embryo size of extruding is detected, guaranteed to manage the embryo precision through the control system again, this advanced person's control mode is used seldom at home.

Sebific duct is extruded from technology and is divided the centreless method, two kinds of core methods are arranged.The major advantage that the centreless method is extruded is that manufacturing process is simple, labour intensity is low, production efficiency is high, and can save auxiliary material such as tube core, and the sebific duct smooth surface is smooth.Its shortcoming is also fairly obvious, and product quality fluctuation is big, and product circularity and specification precision are wayward, and the integral body of sebific duct combines not good if any the core method.The major advantage that has the core method to extrude is that the quality of sebific duct is more stable, and the body density is better, and the product specification size is more accurate.But this production method operation is more than the centreless method, and labour intensity is high, and auxiliary material consume more.

Have the core method to extrude to comprise two kinds of hard core method and soft core methods, most of sebific duct manufacturer custom adopts hard core method to extrude sebific duct.Adopt the hard core can only manual operations, labour intensity be big, and production efficiency is low, and product external diameter uniformity also is difficult to guarantee.Product length is short, generally has only several m, the longest 20m that also is no more than.Mostly sebific duct is the fixed length use, need cut product, and the sebific duct cutting loss that hard core method is produced is very big, and general utilization is merely 70%, and the waste ten minutes is surprising.Soft core method is extruded sebific duct, and the pipe embryo can be coiled bending, produces to take up an area of and lacks; Labour intensity is low, and the production length of product is determined by soft-core wire, almost not restriction; Can realize serialization production, improve the automaticity of production efficiency and production greatly, be worth of widely use.

In the sebific duct pipe embryo extrusion, relatively common quality defects encountered has: the off size requirement of pipe embryo, and the tube wall became uneven, plucked, glue-line breaks, and glue-line bubbles or sponginess, pipe embryo adhesion etc. occur.The reason that produces these quality problems is many, and the factor of influence is also many, analyses item by item as follows at present:

(1) pipe embryo size does not meet standard-required, the tube wall became uneven: core pattern is improper with shape of the mouth as one speaks apolegamy, and sizing material is mixing and plasticate badly, causes the plasticity of sizing material inconsistent; Core pattern and the shape of the mouth as one speaks are eccentric or match improperly, and the sizing material cooking temperature is inhomogeneous, and extruder forwardtransfer signal worm plasticizing capacity is poor, all causes this type problem easily.

(2) pipe embryo thickness is inhomogeneous: the plasticity of sizing material is inconsistent, and cooking temperature is inhomogeneous, and rate of feeding is neglected fast neglecting slowly, and extruded velocity and hauling speed do not match, and can both cause the pipe embryo to extrude the uneven phenomenon of back external diameter thickness.

(3) glue-line breaks: be mixed with impurity such as micelle, solids in the sizing material, perhaps sizing material produces local bin cure, all possibly cause glue-line to break.

(4) glue-line bubbles or sponginess occurs: moisture or low molecular weight volatile thing are too many in the sizing material; Entrained air in sizing material heat refining or the feeding, extruder temperature are too high, and the extruder screw serious wear causes thrust not enough; Cross-head insufficient pressures etc. can both cause glue-line to bubble or sponginess.

(5) pipe embryo adhesion: the cooling of pipe embryo is not enough, the interleaving agent weak effect, and it is too tight to extrude back pipe embryo extruding, and the storage period is oversize, can both cause pipe embryo adherent phenomenon to take place.

2, traction guider and electric control system

Draw guider and electric control system at present; Can realize the Synchronization Control of winding and traction through VFC; But it is few what aspect the cooperation of extruding link, consider; Also be in the state of independent operating separately, can not twine the angle of producing that links from whole steel wire and carry out omnidistance automation control and move.And still be unrealized and extrude, vulcanize freezing and steel wire from sebific duct and twine the close-loop feedback control with the overall link of traction.Do not see as yet that for the fault diagnosis of unusual production status, the technical research and the equipment development of monitoring alarm bibliographical information is arranged.

Summary of the invention

In order to solve existing technical problem in the present sebific duct extrusion linkage production line technology, the present invention mainly carries out the innovation and the improvement of technology, equipment, control mode in the following aspects:

Designed a kind of sebific duct extrusion linkage production method and device thereof, as shown in Figure 1, comprising: 1, soft core let-off gear(stand); 2, front haulage machine; 3, cold feed extruder; 4, power cabinet; 5, temperature control system; 6, caliper; 7, inker; 8, chilled water unit; 9, rear haulage machine; 10, separant coating machine; 11, twin shaft winder; 12, master console; 13, tensioner.Its technological process of production is as shown in Figure 2.

Adopt plastics to extrude and automatic control technology is extruded and automatic control technology with the rubber tube tire, the cold setting of plastics and the cold setting of rubber tube tire and coiling and observation and control technology, development sebific duct pipe tire extrudes and synchronous interaction is controlled and the detection production line.

The cold feeding extrusion linkage production line of described automation sebific duct comprises: it is characterized in that: described sebific duct extruder is provided with some groups of stack shell heaters, Temperature Detector, head pressure sensor, forms the control system that extrudes with frequency converter, PLC.

The cold feeding extrusion linkage production line of described automation sebific duct is characterized in that: the described hauling machine of extruding, and its control system is made up of frequency converter, PLC, pipe range detection rotary encoder, pipe thickness detector; Be provided with manually and change, select, confirm and input setting benchmark numerical value with automatic; According to the pipe thickness deviation from motion tracking, the adjustment hauling speed; Show, set pipe thickness; The electric current, the rotating speed that show hauling machine; Be provided with overcurrent, overvoltage, traction pawl and skid, draw electromechanical components such as protection, warning and fault self-diagnosis such as chain rupture, traction off-axis.

The cold feeding extrusion linkage production line of described automation sebific duct; It is characterized in that: this automation sebific duct extrusion linkage production line is provided with the overall intelligence monitoring system; Adopt sensors such as temperature, pressure, infrared ray or ultrasonic wave; Based on the main control unit of single-chip microcomputer or PLC, adopt field bus technique, upper industrial computer is set; Design can realize various parameter measure and adjust and screen display function; And the information fusion of each road sensor signal and intelligent decision judge system, the handled easily personnel with the change of manufacturing technique requirent adjustment at any time produce the parameter of train line, and can realize various intelligent faults are reported to the police and the fault based on expert database is got rid of Quickstart.

One, extrude link:

1.1 extruder

Mainly form by transmission device, fuselage, head, feeding roller, the warm water circulatory system, lubricating system and electric control system etc.

In the expressing technique link, comprise the air pressure and the head temperature of cross-head, and the screw speed Detection & Controling, guarantee that head pressure is stable; Sizing material uniformity, compactness and the degree of refinement of cold feeding, and foreign matter detects in the sizing material; The Detection & Controling of heater block temperature and electric current; The Collaborative Control of draw-gear and extruder head extruded velocity, and the detection of pipe embryo size and the Collaborative Control of hauling speed etc.

Keeping extrusion capacity stable is the main task of extruder control system, stable for the extrusion capacity that makes extruder, suppresses various interference, and extruder motor speed control system has adopted speed closed loop control.

1.1.1 transmission device:

Main motor slows down through V belt, again through shaft coupling and decelerator human transporting axle, drives output shaft through gear reduction.Output shaft is a hollow-core construction. endoporus is the pipeline that screw rod is heated cooling, and draws from the decelerator afterbody.Reduction case is a steel-casting, has enough strength and stiffness.Casing is provided with the window of three spaciousnesses, can observe the working order and the lubrication circumstances of gear at any time from different perspectives.

1.1.2 fuselage:

Rear fuselage is processed with cast steel. the two sections linings in cooling water inner chamber and front and back are arranged.The lagging material via nitride is handled, and has enough wearabilities.Charge door is located at this section body upper, and feed hopper is settled in the charge door top.Front fuselage is processed with seamless steel pipe, connects with rear fuselage through flange, and heating and cooling effect is preferably arranged.Interior cover material is identical with the front fuselage lagging material.The hermetically-sealed construction loading and unloading at two ends are simple and easy, and sealing property is better.

1.1.3 head:

Handpiece case and fuselage connect with the alligator pliers shape, and the connection place has sealing ring, can rapidly left-hand thread formula clamp be opened when class's back shutdown or replacing specification kind, and head is separated with fuselage, are convenient to clear up surplus glue in head and the fuselage.Head shell adopts cone type to cooperate with the head core body, shuts down back available dedicated instrument the head core body is taken out, and makes and does not stay residual gum in the head.Handpiece case has cavity to supply the usefulness of heating cooling.Support and the castor that supplies to move are arranged at the head bottom.Because the head section is big than other frame sections thermal capacity, thus in temperature control designs, strengthened head add hot merit it, the temperature-rise period of other each section of head and fuselage before preparation reached unanimity basically.Whether uniformly sizing material pressure size and pressure stability are goods one of key factors in head and the fuselage.Head people end is equipped with the high-temperature fusant pressure sensor. and to measure pressure in the head, this pressure statistics have shown on supervisory control desk.The master control circuit is provided with safe pressure alarm circuit, and sizing material pressure one extends above setup pressure value in the head, and complete machine just quits work, with protection head and fuselage.

Head has vacuum extractor, and during the outer glue of wire spirally-wound hose bag, vavuum pump starts, and the coating glue that head is extruded forms vacuum state with steel wire floor, reaches to fit tightly, and the sebific duct after vulcanizing does not like this have bubble and delamination.

After opening alligator pliers, move the head dolly, can make head do separating of big distance easily with fuselage.Adopt the heat resistant rubber wire braided hose on the heating pipe line of head and fuselage and be equipped with snap joint; The check-valves that the snap joint two ends have stainless steel material to process; Make head under following normal operating pressure, open head fast and cut off pipeline, realized separating fast of head and fuselage; The quick gel resin of sizing material in hot water line's the quick separation, head.

Head:

A kind of new right-angle handpiece extrusion system is provided, and the casing of its cross head extruder has the sub-assembly that a fixed center or the non-adjustable shape of the mouth as one speaks can be installed, from the whole process that starts to full speed running, and can the mobile sizing material of balance flowing to the shape of the mouth as one speaks.The shortcoming of shape of the mouth as one speaks sub-assembly in the past is to need constantly to regulate the shape of the mouth as one speaks just can make sebific duct have qualified section size and uniform wall thickness concentricity.The tubular part of preset section size and uniform wall thickness concentricity adopts the extrusion system of this shape of the mouth as one speaks sub-assembly (being torpedo shape spreader), and especially the right-angle handpiece extrusion system is extruded.This shape of the mouth as one speaks sub-assembly has a fixing center, does not need mechanical adjustment just can make sizing material from the whole process that starts to full speed running, flow to the shape of the mouth as one speaks equably.

A key features of this new right-angle handpiece extrusion system is that a fixed center shape of the mouth as one speaks modular construction is arranged in the extruder casing.This torpedo shape spreader shape of the mouth as one speaks sub-assembly will separate into four parts that equate basically from the sizing material of extruder screw, promptly controlled flow, and the shape of the mouth as one speaks just has uniform volume flow like this.Another characteristics of this right-angle handpiece extrusion system are that the external engine body of cross head extruder has adopted a kind of design that can dispose " non-adjustable " shape of the mouth as one speaks.In addition, this extruder has two controllable temperature sections in the front of right-angle handpiece body, passes through the sizing material temperature that the extruder body flows with control.

In extrusion system profile shown in Figure 3, the casing (12) of extrusion system (10) has conical inboard wall surface (14), its at the internal diameter of casing front end less than internal diameter at casing rear end.Casing (12) has thread surface (28) at its front end, so that a shape of the mouth as one speaks (not shown) is screwed on the casing (12).Extrude sub-assembly (18) and be positioned at casing (12) lining, the frustum outer surface (22) of sub-assembly (18) is meshed with the conical inboard wall of casing (12) surface (14).Extrude sub-assembly (18) thorax (32) in the tubulose is arranged.

Thorax (32) internal diameter is consistent in the tubulose, runs through whole sub-assembly (18), in order to transportion wire, core pattern or pipe fitting (not shown).Sub-assembly (18) is fixed in the casing (12) with a nut (not shown), and this nut is to use screw thread (26) to be screwed on the casing.

Sizing material (like unvulcanized sizing material) is transported to the inside of casing (12) through pipeline (40) under high pressure and high temperature.Used pressure and temperature is that sizing material passes through the used pressure and temperature of extrusion system.Sizing material is distributed through the guide groove (42) between the bump surface (24) by the current divider (38) in the fixed center shape of the mouth as one speaks sub-assembly, equably sizing material is separated into two parts that equate basically, the flow that promptly equates.Sizing material continues to distribute forward through guide groove (44), and the sizing material that these two moieties are flow finally separates into the sizing material of four moieties equably.At last, sizing material is directed to thorax (32) in the tubulose.Here, sizing material or distributed equably and be coated on the cylindrical object (like sebific duct, electric wire or core pattern) has the section size of appointment and the sizing material tubular structure of wall thickness concentricity uniformly to provide one; Perhaps be used to provide a unsupported flexible pipe.In casing (12), preferably use one or more temperature-controlled area sections (20), to assist the wall thickness concentricity of control extrudate.And casing (12) is best to have two temperature-controlled area sections especially, and will monitor the temperature of temperature control medium, and is appropriate to guarantee temperature.

1.1.4 feeding and control system thereof:

Feeding roller is contained in rear fuselage charge door side, and roll surface and screw rod turn round relatively, forces to sting in the sheet feeding machine barrel.This device beam is installed with the hinge gate-type, during gel resin, can open the feeding roller support, makes it to rotate about 100 °, is convenient to gel resin.The feeding roller downside is equipped with adjustable glue scraping plate, and its blade can be adjusted according to different sizing materials with the gap of roll surface, and the glue ring is returned in its roll surface both sides, at any time buffings is discharged.

The feed system sketch map is as shown in Figure 4, and schematic diagram is like Fig. 5, shown in 6.When operate as normal, adhesive tape is placed on feeding conveyer belt top, manual, mechanical feed selector switch S3 are pulled manual position, not adhesive of K9; K5 not electric, the given potentiometer R1 of rotary speed, 4,5 pin of K5 link to each other, K2 is not; Import given signal for the E300115-1Q controller by 10 pin of K2, conveyer belt master motor M 1 drives the adhesive tape operation, treats that adhesive tape has been sent in the machine barrel position that can be screwed in by screw rod; Given potentiometer is returned zero, stop to transport, S 3 pulls automated location.

After the driving screw rotation, get final product mechanical feed.If meet special circumstances, during the counter-rotating of palpus conveyer belt, press conveyer belt rotating inching button S4, counter-rotating contactor K4 connects, and changes the motor excitation direction, the realization counter-rotating.K2 connects simultaneously, and 10 pin of K2 are linked to each other with the inner adjustable resistance of K2 (generally being uncomfortable), makes motor by the intrinsic given speed rotation in inside (actual speed is lower), that is to say that speed is non-adjustable when counter-rotating, and this confirms according to process conditions.

Automatically feed realization as shown in Figure 6 when just changeing: B2 is two generators; Be installed in the terminal of feeding band; When driving screw begins to rotate, adhesive tape is involved in the machine barrel, adhesive tape drives the conveyer belt low cruise; Conveyer belt drives this two generator rotations through frame for movement simultaneously, and generator sends voltage.When S3 is pulled automated location; K5 gets electric, and the original loop of leaning on R1 resistance given speed is changed into by generator B2 through 15,16 pin of K5 to the A element, is delivered in the controller through the resistance tap 10 in the A element; Given signal as main motor M 1; Because the voltage that sends of B2 is directly proportional with the rotating speed of driving screw, so its given signal of delivering to controller also is directly proportional with the rotating speed of driving screw, and this has just guaranteed the synchronous of feeding and screw speed.

1.1.5 screw rod:

The screw rod material is also identical with the front fuselage lagging material.Wearability is good, and hardness is high; Screw-rod structure is the major-minor helicitic texture, and helical pitch is big.Junction, major and minor spiral shell position is adopted and is fed slow transition, makes all spoons of goods plasticizing, and production capacity is high, and the screw rod self-cleaning is good.

(1), the improvement of the horizontal rib of exhaust cold feed extruder screw rod

Screw rod is extruder most important work parts, and the title of " extruder heart " is arranged.Whether the structure and parameter of screw rod is selected reasonable, with the service behaviour that directly influences extruder.The basic demand of screw design is to carry out extruding of high yield and high quality economically; For the screw rod of pressing the shape extruder; Except requiring can stabilized uniform to extrude, also want can produce higher pressure accurate with assurance half-finished compactness and the physical dimension extruded.

The composition structure of the working mechanism of exhaust cold feed extruder and screw rod thereof:

In extrusion, the rerum natura of sizing material has certain variation, and this variation is particularly evident on cold feed extruder.Usually the sizing material that adds extruder is elastomeric state, and along with the carrying out of extrusion, sizing material temperature and pressure under the intense shear of screw rod, compression raise gradually, and present viscous state.According to the situation of change of sizing material rerum natura in extrusion, the working portion of screw rod can be divided into feeding section, fluxing zone and extruding zone (claiming metering section again) substantially.The production capacity of extruder depends on the charging ability of feeding section and the plasticating capacity of extruding zone to a great extent.Mixing and the plasticizing quality of sizing material is then directly relevant with the plasticizing capacity of fluxing zone.For the exhaust cold feed extruder, its screw rod is then formed by four sections usually, i.e. feeding section, first metering section, exhaust section and second metering section.In fact exactly between fluxing zone and extruding zone, increased by one section what is called " exhaust section ".The quality of its exhaust effect will determine whether sizing material inside contains bubble, thereby have influence on the compactness and the presentation quality of product.

(2), the operation principle of exhaust cold feed extruder:

Sizing material from spout entering extruder often is entrained with little of gas, under the effect of rotary screw; Feeding section sizing material has only part to be full of screw channel, when getting into first metering section, because the screw channel of this section is more shallow; Thereby sizing material receives strong shearing and compression is plastified with mixing preferably; Temperature and pressure also raises gradually, and sizing material is full of screw channel fully, and begins to demonstrate the rerum natura of viscous state.The screw channel of exhaust section is dark and helical pitch is also big than first metering section; So its screw channel volume enlarges markedly, after sizing material gets into this section, owing to containing gas (gasification product that comprises moisture content and volatile matter) and produce bubble in inside; Bubble breaking under the cutting of spiral shell rib; Gas is extracted out with vavuum pump from exhaust outlet, and the gas of extraction is through condenser condenses, filtration, to remove harmful substance.Sizing material after the degasification continues to transport to second metering section and does further plasticizing and mixing, and under the squeezing action of screw rod, sizing material is extruded from head with certain pressure and temperature.Fig. 7 is seen in the screw-rod structure of exhaust cold feed extruder and the signal of change of pressure curve.

(3), influence the principal element of exhaust efficiency:

1) flow of exhaust section.Flow greatly then exhaust efficiency is low.

2) charging degree.The charging degree refers to have in the exhaust section thread groove material part section

Ratio with the thread groove basal area.Then exhaust efficiency is low for charging degree height.

3) time of staying.Sizing material is long more in the time of staying of exhaust section, and exhaust efficiency is high more.

4) shear strength.Shear strength is big more, and then exhaust efficiency is high more.

The screw rod of rubber exhaust cold feed extruder of the present invention; Its fluxing zone has adopted major-minor screw-type screw rod; It is made up of the major-minor screw thread that two helical pitches do not wait; The height of deputy thread plastifies the sizing material that demonstrates VISCOUS FLOW and can cross deputy thread spiral shell rib entering deputy thread dorsal part screw channel a little less than main thread, and the sizing material that plasticizing is good then continues to stay the positive side screw channel of deputy thread and further plastifies.Major-minor screw-type screw rod has strong shearing and plasticizing capacity, extrudes so can under high rotating speed, realize high-quality, and strong to the sizing material adaptability of processing, and have self-cleaning preferably, exhaust, the anti-thorax performance of sweeping.This screw rod was provided with unique horizontal rib structure before the exhaust section steam vent, see Fig. 8 for details.

Sizing material flows in screw channel, owing to the effect that receives horizontal rib produces strong shearing and mixing, therefore can be plastified preferably with mixing.Operating pressure will reach the peak value of first metering section in the time of can finding out that by Fig. 1 sizing material is before horizontal rib; Pass through behind the horizontal rib because the unexpected increase of screw channel volume; Cause pressure significantly to descend, make gas contained in the sizing material, moisture content and volatile matter gasification, bloat bubble; Bubble is broken under the dissection of exhaust spiral shell rib, and the vacuum-pumping pipeline through exhaust outlet is with these air scavenge.So no matter the product that has used the extruder of this structure screw rod to produce is the instructions for use that all can satisfy the user on compactness or the presentation quality, favored by the user.But many employed sizing materials of user are not quite similar, cold feed extruder particularly, add sizing material hardness and viscosity thereof also be very different.They can frequent conversion use the bigger sizing material of physical difference according to the different performance requirement of its product of producing on same extruder.Therefore in actual extrusion, following situation will appear:

(1) when using the lower sizing material of hardness, through the plasticizing of fluxing zone mixing after, the compound viscosity that has presented viscous state is also less, its fluid ability is better, easily through the horizontal rib of exhaust section.The gap delta value at horizontal rib and the screw channel top of this moment just should design littler, to limit the flowing velocity of sizing material, so not only can limited flow but also can prolong the time of staying of sizing material at exhaust section, and help improving exhaust efficiency.Otherwise, steam vent will occur and too much cause the phenomenon of " emitting glue ", thereby stop up steam vent, and make the steam vent can't operate as normal, increase the frequency of cleaning steam vent because of this position collection glue.

(2) when using the higher sizing material of hardness; The gap delta value at horizontal rib and screw channel top then must design big; To adapt to passing through of those mobile relatively poor high viscosity sizing materials, can be filled to the second metering section screw channel as early as possible after making the sizing material exhaust, equal even output stable continuously that guarantees to extrude.Because the screw rod that former German Berstoff company technique is produced, its horizontal rib and screw design structure in aggregates are so once machining, its horizontal rib height is unmodifiable.The user was when ordering goods in the past, and the hardness range that used sizing material must be provided is for manufacturing and designing reference.When if the sizing material firmness change is big, need to be equipped with two even more screw rod.Because of the screw rod material is preferentially selected the 38CrMoAlA steel for use; Cost an arm and a leg, and processing technology is complicated, ion Plasma Nitriding Treatment also need be carried out in its surface; So cost is high; Article one, φ 75 * 16 extruder screw prices will more than 10,000 yuan, and φ 200 extruder screw prices are more up to 100,000 yuan, and this will improve user's equipment input cost greatly.

The present invention proposes two kinds of horizontal rib schemes of improved screw rod, adopt split-type structural to solve the above problem of bringing because of the sizing material firmness change preferably.

Improvement project one:

Movable transverse rib structure is for the small dimension extruder, and its spiral shell rib is narrower, receives the restriction of installing space, and the suffered moment of torsion of screw rod is less relatively.For this reason, we adopt and directly make former horizontal rib position into dismountable movable transverse rib structure, see Fig. 9.

Its specific practice: the horizontal rib position original mills out mounting platform in advance; And process keyway and screw is installed; In order to guarantee that screw rod main body and movable transverse rib all have enough intensity and anti-shear ability; Section thickness slightly increases, and movable transverse rib bottom processes the key that cooperates with keyway, and is installed on the mounting platform that the screw rod main body mills out in advance with soket head cap screw.This structure adopts keyway connecting mode to guarantee that movable transverse rib can bear sizing material plasticizing and mixing moment of torsion and the shearing force of transmitting.The processing of movable transverse rib is also more convenient, and in general the movable transverse rib of three kinds of height of screw rod outfit specifications just can satisfy the instructions for use of most sizing materials basically.This features simple structure is prone to row, for the sizing material of different hardness, through changing the height specification of movable transverse rib, can change the gap delta value at horizontal rib and screw channel top, and problem is solved preferably.

Improvement project two:

Two halves baffle ring structure.

For the extruder of big specification, the moment of torsion that screw rod bore obviously increases, and must adopt the stronger structure of anti-shear ability, and two halves baffle ring structure proposes according to this requirement, sees Figure 10.

This structure mainly is made up of two location flat key and mounting screws that have keyway and two semi-rings that screw is installed, bear moment of torsion.Procedure of processing is following:

(1) the horizontal rib position car of screw rod goes out annular ditch groove, and processes keyway and screw is installed.

(2) have keyway and the full circle retainer ring that screw is installed by several of dimensioned that are complementary with annular ditch groove, from the centre it is separated into two semi-rings (semi-finished product) with the line cutting then and pairing is used.

(3) one group of two semi-ring (semi-finished product) is installed in soket head cap screw on the annular ditch groove of screw rod main body, goes out to meet the horizontal rib of certain sizing material hardness range by the screw channel Machining of Curved Surface of screw rod.

(4) change another to two semi-rings (semi-finished product) installation in position, in kind process the horizontal rib that meets another kind of sizing material hardness range.So can process the two halves baffle ring of the horizontal rib of many group differing heights specifications.

(5) material of two halves baffle ring is consistent with screw rod, and the surface ion nitrogen treatment is carried out with stove in the processing back.This structure is comparatively complicated, and process is also quite loaded down with trivial details.But, lean on keyway to bear the moment of torsion that the screw rod rotation produces, therefore especially suitable φ instructions for use of specification exhaust cold feed extruder greatly more than 150 owing to adopted annular ditch groove to bear the axial compressive force that sizing material plasticizing produces when mixing.For the sizing material of different hardness, through changing the two halves baffle ring of differing heights specification, can change the gap delta value at horizontal rib and screw channel top, reach a solution of a problem.

Melt zone is one of important function section in the common single screw extrusion machine.Polymer masses receives strong shearing of machine barrel and screw rod and extruding through this section the time, accomplish mixing of materials and plasticizing process.Because the phase transformation from solid-state (Solid Bed) to liquid (molten bath) takes place material, therefore need to consume a large amount of higher amorphous polymers of heat energy and mechanical energy, especially viscoplasticity.Usually, the melt zone spiro rod length accounts for 50%～60% of screw rod total length.This shows that whether reasonable in design this section geometry is, be directly connected to Products Quality and production cost

Applied Computer Techniques is optimized design to the main geometrical structure parameter of melt zone screw rod.The structural representation of common extruder screw is shown in figure 11.As can beappreciated from fig. 11, the spiral groove depth of melt zone shoals gradually, and this mainly is a function of shearing plasticizing in order to strengthen.Because the relative motion between machine barrel and the screw rod, polymer masses receives strong extruding and shearing motion in machine barrel, formed the shear flow of melt gradually by the plunger motion of Solid Bed.The speed Vb of the relative screw rod of machine barrel can be confirmed by following formula:

$V_b=\frac{\mathrm{\π}{D}_b\mathrm{\ω}}{60}---\left(1\right)$

Then the shear rate γ b at machine barrel wall place can be expressed from the next:

${\mathrm{\γ}}_b=\frac{\mathrm{\π}{D}_b\mathrm{\ω}}{60H}---\left(2\right)$

In the formula: D _b-machine barrel internal diameter;

ω---machine barrel is with respect to the angular speed of screw rod;

H---the mean depth of melt zone screw channel.

The computing formula of H does

H＝(H1+H3)/2

In the formula, H1 and H3 are respectively feeding section spiral groove depth and metering section spiral groove depth.Igneous theory mainly is based on thermodynamics and rheology is set up.Typical melting model is shown in figure 12 in the polymer-extruded process.At first, the Solid Bed surface that contacts with hot machine barrel forms the thin melt film of one deck gradually.When melt film thickness surpassed screw rod and machine barrel gap delta, the spiral shell rib radially scraped melt film from machine tube inner wall, and converged at the screw thread pressure surface and form circulating-area (molten bath).Along with screw channel shoal gradually and screw channel and machine barrel between shear action, the molten bath enlarges gradually, Solid Bed is then correspondingly dwindled until disappearance, melt gets into the metering section of screw rod.In general extrusion, the shear flow of polymer melt is obeyed power law haply, and it can be expressed as in the shear viscosity η b at machine barrel wall place and the relation of shear rate and temperature:

${\mathrm{\η}}_b={\mathrm{\η}}_r{\left(\frac{{\mathrm{\γ}}_b}{{\mathrm{\γ}}_r}\right)}^{n-1}\exp [-\mathrm{\ξ}(T-T_r)]---\left(3\right)$

η in the formula _r---the reference viscosity of polymer;

γ _r---with reference to shear rate;

ξ---power constant;

N polymer flow behavior index;

T---operation absolute temperature;

Tr---with reference to absolute temperature.

Traditional extruder screw, its lead angle θ gets 17.66 ° mostly.Preamble has carried out theory analysis to melting process in [7], and the optimum valuing range of suggestion θ is 17.66～34 °.Among the present invention, θ * gets 22 °, is positioned at optimum valuing range.Someone once studied the influence of groove depth to the Solid Conveying and Melting rate, found that best groove depth increases along with the increase of screw diameter.For example, when screw diameter is 30mm, H*1/Db=0.15; And when screw diameter is 65mm, H*1/Db=0.185.Among the present invention, screw diameter is 70mm, gets H*1=14mm, and promptly H*1/Db=0.20 meets the variation tendency that best groove depth increases along with screw diameter.The increase of screw flight top width degree can strengthen the shear action to material, helps the material fusion plastification, but increases power consumption simultaneously again.Span by aforesaid design parameter is known e=(0.08～0.12) Ds, among the present invention, and Ds=60mm.Like this, e=4.8～7.2mm, promptly the e* value is near higher limit.

Spiral groove depth, spiral shell rib top width degree and lead angle are directly connected to production capacity, plasticizing quality and the energy consumption of extruder.Therefore, getting these geometric parameters is design variable, is optimization aim with specific yield energy consumption minimum, has set up the extruder melt zone screw rod optimal design mathematics model of simplifying.The application constraint complex method is found the solution.The result shows, the screw rod melt zone rises, the optimum value of terminal spiral groove depth, spiral shell rib top width degree and lead angle is respectively 15mm, 4mm, 7mm and 22 °, the optimum valuing range that all is arranged in or advises near document.

1.1.6 warm water cyclic system:

Warm water feelings loop systems is divided following five sections: head, fuselage deferent segment, fuselage fluxing zone, fuselage feeding section, screw rod.Every section temperature all can be controlled separately, is made up of five road independent loops, and is easy to maintenance, and reliability is high.This system adopts advanced controller funeral, and the stability of design temperature has designed low-voltage variation and heated protective for 1 ℃ of scholar (real work measure temperature and can reach ± 0.2 ℃) in the system, make system works safe and reliable.

This system is made up of major loop and cooling circuit.Major loop is formed closed loop by cooling tank, heating tank, pump, workspace and water injection pipe; Cooling circuit is made up of magnetic valve and cooling tube.The A point is a heating rod system point, and the B point is the cooling control point, all adopts time scale PID control.

When the workspace temperature was on the low side, heating rod began heating, adds heat and is provided by pid algorithm; During the workspace temperature drift, magnetic valve is opened, and cooling circuit is started working, and heat unnecessary in the major loop is taken away, thereby made temperature constant at setting value soil.

This system is provided with low-voltage variation, crosses when low when anhydrous in the loop or hydraulic pressure, and circulating pump and heater can't be worked, and can prevent that heater from adding cause thermal damage and damaging circulating pump because of the water vapor of low-pressure water major loop under anhydrous state.System also is provided with heated protective, promptly when pump does not turn round, can not heat, and prevents the stagnant water heating.But temperature control instrument display setting temperature, actual temperature and temperature control duty come into plain view the operator.

1.1.7 lubricating system:

Reducer gear and bearing are lubricated with 50# machine oil or 11# saturated steam cylinder oil.Oil pump unit through outer connected tank is implemented forced feed lubrication and cooling with pleased each bearing and the gear pair delivered to of lubricating oil to the decelerator each several part, returns fuel tank then, and wherein high gear is carved the appropriate splash lubrication of using.Through three forms of translucent cover loam cake and side on tops such as deceleration and the transparent flexible rubber hose of box flange bottom, can keep watch on the lubrication circumstances at each position at any time.

1.1.8 subsidiary engine:

Subsidiary engine becomes 90 with the host center line.The angle arranged vertical consists of the following components:

(1), rear towing device

This device is equipped with RHVC with alternating current generator and drives, and is mainly used in arrangement and conveying before glue core or steel wire are strengthened sebific duct input cross-head afterbody, holds glue core or steel wire by two slat gum strap clamps and strengthens sebific duct and import to the head rear portion.This device can be regulated through mechanical driving device for the work hypermutation.

(2) laser diameter measurement device:

This device is positioned at the head gum outlet, when the steel wire that has wrapped glue is strengthened sebific duct through the laser diameter measurement place, promptly statistics have shown on the operating desk.This production line of caliper and control system adopts the caliper on-line measurement to extrude the sebific duct overall diameter.Caliper is placed near the cross-head; Can obtain metrical information as soon as possible; The output control signal is given the front and back hauling machine after the measurement result process internal proprietary Computer Processing, they is carried out Synchronization Control, to proofread and correct the deviation that sebific duct produces in extrusion.This control system can eliminate any long-term variation quite effectively.The technical parameter of caliper is following:

Measurement category 0.1～60mm

Resolution ratio 0.01mm

Accuracy＜0.02mm

200 s-1 of scan frequency

Control mode PID

Output signal 0～10DCV

(3) cooling bath:

This groove is processed by stainless steel, when sebific duct passes through this groove, above sebific duct, forms a spray cooling line and air cooling phoenix curtain.Water behind the spray flows in the hopper of cooling bath bottom, through spray etc. sebific duct is forced cooling by water pump again, by compressed air the globule on the sebific duct is dried up then.

(4) pre-traction device:

This device and rear towing device structure are basic identical, are put by alternating current generator distribution transforming speed governing frequently bag to drive, and hold the steel wire reinforcement sebific duct that has printed trade mark by two slat gum strap clamps and carry to devices for taking-up.The linear velocity of pre-traction device directly influences the encapsulate thickness that steel wire is strengthened sebific duct.Under the constant condition of screw speed, hauling speed is accelerated, then rubber layer wall thickness attenuation. and the wire spirally-wound hose external diameter diminishes; Hauling speed slows down, and then the rubber wall thickness increases, and steel wire is strengthened the sebific duct external diameter and become big.Otherwise when hauling speed was constant, the variation of screw speed also can directly influence the thickness that twines rubber adhesive.Therefore, in the laser diameter measurement automatic feedback system, the linear velocity of screw speed and front haulage machine is two main variablees.

Hauling machine provides and makes soft core and the sebific duct power of operation continuously, and its ruuning situation directly affects the quality of product.In this production line, two hauling machines before and after having used altogether, their synchronous operation under the control of caliper, its major technique

Parameter is following:

Bandwidth 95mm

Traction clamping length 600mm

Operating rate 0～35mmin-1

Speed stability＜10-3

Power of motor 2.2kW

0～200mm is adjustable in the clamping belt gap

Prevent that in order to guarantee soft core to derive and extrude the back smooth rolling of sebific duct smoothly sebific duct from stretching or pile up, in production line specialized designs constant tension device, guaranteed sebific duct running status stable in production line.Squeeze under the stable prerequisite of gel quantity and sebific duct running status in production line at extruder, will be controlled effectively the overall diameter of sebific duct by the closed-loop control system that two hauling machines of caliper and extruder front and back constitute, control accuracy reaches ± 0.1mm.It should be noted that; The speed of two hauling machines in front and back is not synchronous; But it is poor to have certain speed, and this has overcome effectively because two hauling machines are asynchronous and the error brought owing to the shake of hauling speed, has improved the precision of extruding of production line greatly.

In order to make sebific duct not adhesion mutually in sulfidation, before curling, must on tube wall, be coated with the last layer interleaving agent.This device adopts the spray mode, and compressed air blowing dry device is housed, and is coated in the separation layer thickness on the sebific duct through adjusting compressed-air actuated air quantity adjustment.

(5) lead out and devices for taking-up:

The effect of unwinding equipment is that soft core or interior glue are derived from rotary drum, and the effect of devices for taking-up then is that the sebific duct of extruding fitly is wrapped on the rotary drum.These two devices all have power.For guarantee this two covering device can with whole production line synchronous operation, designed tenslator, and with lead out and devices for taking-up constitutes closed-loop system, make sebific duct keep permanent tension force in process of production, guaranteed the stable of production process.

1.2 extruder control system

The principal element that influences the crowded gel quantity of extruder is a screw speed, the temperature of extruder feeding section, the section of plasticating, extruding zone, screw rod, head and the shape of the mouth as one speaks, extruder rate of feeding etc.The stability that extruder squeezes gel quantity is embodied on the head pressure usually.For this reason; Specialized designs high-precision temperature control system; Make each section of extruder control accuracy of temperature reach ± 1 ℃; The closed-loop control system of utilizing a high-temperature fusant pressure transmitter, PID single-loop regulator and RHVC to constitute is simultaneously accurately controlled screw speed to guarantee the cross-head pressure stability, and control accuracy is ± 0.1MPa.Through above-mentioned two measures, can under common feeding condition, make crowded gel quantity of extruder and extruded velocity all highly stable.

Extruder control system is shown in figure 13, mainly is made up of frequency converter, PLC, 5 stack shell heaters, 6 Temperature Detectors, and it mainly accomplishes following function:

1. blanking amount adds special confession amount device scalable, metering, demonstration.

2. cooling water electric control valve ZAZP or small-bore electrical ball valve in the screw rod.

3. engine speed, electric current, manual, automatic adjusting, warning, output offer the hauling machine signal when stopping.

4. the barrel temperature signal is imported the master control computer.

5. gear-box oil pressure monitoring.

6. other (interior cooling water pipe fouling, raw material are overheated, cold excessively, caking etc.).

When big problem takes place when, increase considerably or decline, main frame material plug, main motor shutdown etc. like conveying capacity, extruder control system can reflect and adjust hauling machine rapidly.

1.3 extruder hauling machine control system:

Hauling machine provides power for stretching, and directly influences and determine the thickness of sebific duct, and is also influential to diameter.Hauling machine control system is made up of frequency converter, PLC, pipe range detection rotary encoder, pipe thickness detector, and shown in figure 14, it mainly accomplishes following function:

Have when 1. starting shooting manually and change, select, confirm and input setting benchmark numerical value with automatic.

2. according to the pipe thickness deviation from motion tracking, the adjustment hauling speed.

3. show, set pipe thickness.

4. the electric current, the rotating speed that show hauling machine.

5. have overcurrent, overvoltage, traction pawl and skid, draw protection, warning and fault self-diagnosis functions such as chain rupture, traction off-axis.

6. with extruder speed synchronization, interlocked control function are arranged, when extruder material plug or idle running or shutdown for some reason, hauling machine quits work automatically.

In the freezing link of sebific duct subsequently, comprise the Detection & Controling of cryogenic temperature; The freezing degree of sebific duct, the i.e. Detection & Controling of sebific duct hardness.And sebific duct hauling speed and the coordination control of hauling speed in earlier stage.

Twine link at sebific duct, emphasis is realized the automation adjustment of sebific duct controller, and the automatic control of haulage gear.Employing winding and traction be the independent motor transmission system respectively, and the revolution by advanced person's control system controls two motors through adjusting the coupling that the control system accomplishes winding revolution and hauling speed, satisfies the needs of sebific duct winding process.And be provided with automatic broken string, intact line lugs.

1.4 master console:

Master station is the core of whole production line, can operate and control all equipment, and show the various running parameters of production line.Recorder can write down the situation of change of cross-head pressure in the production process and sebific duct overall diameter automatically.Central processing unit is monitored the working condition of each system in real time, guarantees the whole production line coordinated operation.

1.4.1 electrical system:

The strength motor that drives that adopts is a dc motor, and electric-control system is set up the eleventh of the twelve Earthly Branches jointly by silicon controlled rectifier transmission cabinet and electric operation.Host-initiated is arranged on the operating desk, stop and main electrical power, electric current, voltage etc. show signal and Displaying Meter totally two covers.Also be provided with pump start and stop button on the operating desk, pump start and host-initiated interlocking starts under the oil pump duty guaranteeing

1.4.2 the control of main frame:

Screw speed is silicon controlled rectifier control, can be in 5.5-55r/min stepless speed regulation.Control circuit is provided with main motor overload protection.Also be furnished with switch and the Displaying Meter of handling subsidiary engine on the operation board, have forward and backward hauling machine linear velocity adjusting knob and linear velocity numeral to show, sizing material pressure numeral shows in the head, is demonstrated the number implement and the recorder of semi-finished product external diameter by the laser diameter measurement feedback.Display precision is 0.01mm.Calculating arrangement through to linear velocity, laser diameter measurement and the related data of forward and backward hauling machine in the production process provides Mathematical Modeling.Behind given sebific duct external diameter, show and feed back to forward and backward traction electric machine through laser diameter measurement, can reach self-regulating purpose, thereby reach the given sebific duct diameter of design.

Description of drawings

Fig. 1 is the automatic extruding production line sketch map of the cold feeding of sebific duct;

Fig. 2 extrudes production department's division technique flow chart;

Fig. 3 is a right-angle handpiece extrusion system profile;

Fig. 4 is the feed system sketch map

Fig. 5 is feeding section part control loop figure

Fig. 6 is a feeding section control system major loop schematic diagram, wherein, and M1-feeding conveyer belt master motor; B1-feeding conveyer belt master motor speed measuring generator; The B2-generator; R1-manual setting potentiometer

Fig. 7 is screw-rod structure and change of pressure curve synoptic diagram

Fig. 8 is that horizontal rib structure is analysed and observe

Fig. 9 is a movable transverse rib structure

Figure 10 is two halves shelves ring structures

Figure 11 is the extruder screw rod structure sketch map

Figure 12 is a melting model

Figure 13 is the extruder course of work and control block diagram;

Figure 14 is the hauling machine course of work and control block diagram;

The specific embodiment

Below in conjunction with specific embodiment the present invention is described, but is not limited to the technical scheme of listed embodiment.

Designed a kind of automation sebific duct extrusion linkage production line, as shown in Figure 1, comprising: 1, soft core let-off gear(stand); 2, front haulage machine; 3, cold feed extruder; 4, power cabinet; 5, temperature control system; 6, caliper; 7, inker; 8, chilled water unit; 9, rear haulage machine; 10, separant coating machine; 11, twin shaft winder; 12, master console; 13, tensioner.

Its technological process of production is as shown in Figure 2: comprised the Tension Control that interior glue is extruded, the The synchronized Coordinative Control of the external diameter detection that head internal pressure and temperature control, inside and outside glue-line are extruded, cooling water temperature control, front and back hauling machine and control of moulding backward pull and wrap-up etc.

The sebific duct extruder is provided with some groups of stack shell heaters, Temperature Detector, head pressure sensor, and its control system is made up of frequency converter, PLC, pipe range detection rotary encoder, pipe thickness detector; Be provided with manually and change, select, confirm and input setting benchmark numerical value with automatic; According to the pipe thickness deviation from motion tracking, the adjustment hauling speed; Show, set pipe thickness; The electric current, the rotating speed that show hauling machine; Be provided with overcurrent, overvoltage, traction pawl and skid, draw electromechanical components such as protection, warning and fault self-diagnosis such as chain rupture, traction off-axis.

Extruding link, its extruder mainly is made up of transmission device, fuselage, head, feeding roller, the warm water circulatory system, lubricating system and electric control system etc.Be provided with air pressure, the head temperature of cross-head, and screw speed Detection & Controling device, guarantee that head pressure is stable; Sizing material uniformity, compactness and the degree of refinement of cold feeding, and foreign matter detects in the sizing material; The Detection & Controling of heater block temperature and electric current; The Collaborative Control of draw-gear and extruder head extruded velocity, and the detection of pipe embryo size and the Collaborative Control of hauling speed etc.Keeping extrusion capacity stable is the main task of extruder control system, stable for the extrusion capacity that makes extruder, suppresses various interference, and extruder motor speed control system has adopted speed closed loop control.

The transmission link of extruder, its main motor slows down through V belt, again through shaft coupling and decelerator human transporting axle, drives output shaft through gear reduction.Output shaft is a hollow-core construction. endoporus is the pipeline that screw rod is heated cooling, and draws from the decelerator afterbody.Reduction case is a steel-casting, has enough strength and stiffness.Casing is provided with the window of three spaciousnesses, can observe the working order and the lubrication circumstances of gear at any time from different perspectives.

Extruder fuselage, its back segment adopt cast steel to process. the two sections linings in cooling water inner chamber and front and back are arranged.The lagging material via nitride is handled, and has enough wearabilities.Charge door is located at this section body upper, and feed hopper is settled in the charge door top.Front fuselage is processed with seamless steel pipe, connects with rear fuselage through flange, and heating and cooling effect is preferably arranged.Interior cover material is identical with the front fuselage lagging material.The hermetically-sealed construction loading and unloading at two ends are simple and easy, and sealing property is better.

Cross-head shell and fuselage connect with the alligator pliers shape, and the connection place has sealing ring, can rapidly left-hand thread formula clamp be opened when class's back shutdown or replacing specification kind, and head is separated with fuselage, are convenient to clear up surplus glue in head and the fuselage.Head shell adopts cone type to cooperate with the head core body, shuts down back available dedicated instrument the head core body is taken out, and makes and does not stay residual gum in the head.Handpiece case has cavity to supply the usefulness of heating cooling.Support and the castor that supplies to move are arranged at the head bottom.Because the head section is big than other frame sections thermal capacity, thus in temperature control designs, strengthened head add hot merit it, the temperature-rise period of other each section of head and fuselage before preparation reached unanimity basically.Whether uniformly sizing material pressure size and pressure stability are goods one of key factors in head and the fuselage.Head people end is equipped with the high-temperature fusant pressure sensor. and to measure pressure in the head, this pressure statistics have shown on supervisory control desk.The master control circuit is provided with safe pressure alarm circuit, and sizing material pressure one extends above setup pressure value in the head, and complete machine just quits work, with protection head and fuselage.

Head has vacuum extractor, and during the outer glue of wire spirally-wound hose bag, vavuum pump starts, and coating glue and steel wire floor formation vacuum state that head is extruded reach and fits tightly, and the sebific duct after the sulfuration does not have bubble and delamination.

Cross-head adopts a kind of new right-angle handpiece extrusion system; The casing of its cross head extruder has the sub-assembly that a fixed center or the non-adjustable shape of the mouth as one speaks can be installed; From the whole process that starts to full speed running, can the mobile sizing material of balance flowing to the shape of the mouth as one speaks.The tubular part of preset section size and uniform wall thickness concentricity can adopt have the said shape of the mouth as one speaks sub-assembly extrusion system of (being torpedo shape spreader), and especially the right-angle handpiece extrusion system is extruded.This shape of the mouth as one speaks sub-assembly has a fixing center, does not need mechanical adjustment just can make sizing material from the whole process that starts to full speed running, flow to the shape of the mouth as one speaks equably.

A key features of this new right-angle handpiece extrusion system is that a fixed center shape of the mouth as one speaks modular construction is arranged in the extruder casing.This torpedo shape spreader shape of the mouth as one speaks sub-assembly will separate into four parts that equate basically from the sizing material of extruder screw, promptly controlled flow, and the shape of the mouth as one speaks just has uniform volume flow like this.The external engine body of this right-angle handpiece extrusion system has adopted a kind of design that can dispose " non-adjustable " shape of the mouth as one speaks, and in the front of right-angle handpiece body two controllable temperature sections is arranged, and passes through the sizing material temperature that the extruder body flows with control.

In extrusion system profile shown in Figure 3, the casing (12) of extrusion system (10) has conical inboard wall surface (14), its at the internal diameter of casing front end less than internal diameter at casing rear end.Casing (12) has thread surface (28) at its front end, so that a shape of the mouth as one speaks (not shown) is screwed on the casing (12).Extrude sub-assembly (18) and be positioned at casing (12) lining, the frustum outer surface (22) of sub-assembly (18) is meshed with the conical inboard wall of casing (12) surface (14).Extrude sub-assembly (18) thorax (32) in the tubulose is arranged.

Thorax (32) internal diameter is consistent in the tubulose, runs through whole sub-assembly (18), in order to transportion wire, core pattern or pipe fitting (not shown).Sub-assembly (18) is fixed in the casing (12) with a nut (not shown), and this nut is to use screw thread (26) to be screwed on the casing.

Sizing material (like unvulcanized sizing material) is transported to the inside of casing (12) through pipeline (40) under high pressure and high temperature.Used pressure and temperature is that sizing material passes through the used pressure and temperature of extrusion system.Sizing material is distributed through the guide groove (42) between the bump surface (24) by the current divider (38) in the fixed center shape of the mouth as one speaks sub-assembly, equably sizing material is separated into two parts that equate basically, the flow that promptly equates.Sizing material continues to distribute forward through guide groove (44), and the sizing material that these two moieties are flow finally separates into the sizing material of four moieties equably.At last, sizing material is directed to thorax (32) in the tubulose.Here, sizing material or distributed equably and be coated on the cylindrical object (like sebific duct, electric wire or core pattern) has the section size of appointment and the sizing material tubular structure of wall thickness concentricity uniformly to provide one; Perhaps be used to provide a unsupported flexible pipe.In casing (12), preferably use one or more temperature-controlled area sections (20), to assist the wall thickness concentricity of control extrudate.And casing (12) is best to have two temperature-controlled area sections especially, and will monitor the temperature of temperature control medium, and is appropriate to guarantee temperature.

Extruder feeding and control system thereof:

Feeding roller is contained in rear fuselage charge door side, and roll surface and screw rod turn round relatively, forces to sting in the sheet feeding machine barrel.This device beam is installed with the hinge gate-type, during gel resin, can open the feeding roller support, makes it to rotate about 100 °, is convenient to gel resin.The feeding roller downside is equipped with adjustable glue scraping plate, and its blade can be adjusted according to different sizing materials with the gap of roll surface, and the glue ring is returned in its roll surface both sides, at any time buffings is discharged.

The feed system sketch map is as shown in Figure 4, and schematic diagram is like Fig. 5, shown in 6.When operate as normal, adhesive tape is placed on feeding conveyer belt top, manual, mechanical feed selector switch S3 are pulled manual position, not adhesive of K9; K5 not electric, the given potentiometer R1 of rotary speed, 4,5 pin of K5 link to each other, K2 is not; Import given signal for the E300115-1Q controller by 10 pin of K2, conveyer belt master motor M 1 drives the adhesive tape operation, treats that adhesive tape has been sent in the machine barrel position that can be screwed in by screw rod; Given potentiometer is returned zero, stop to transport, S3 pulls automated location.

After the driving screw rotation, get final product mechanical feed.If meet special circumstances, during the counter-rotating of palpus conveyer belt, press conveyer belt rotating inching button S4, counter-rotating contactor K4 connects, and changes the motor excitation direction, the realization counter-rotating.K2 connects simultaneously, and 10 pin of K2 are linked to each other with the inner adjustable resistance of K2 (generally being uncomfortable), makes motor by the intrinsic given speed rotation in inside (actual speed is lower), that is to say that speed is non-adjustable when counter-rotating, and this confirms according to process conditions.

Automatically feed realization as shown in Figure 6 when just changeing: B2 is two generators; Be installed in the terminal of feeding band; When driving screw begins to rotate, adhesive tape is involved in the machine barrel, adhesive tape drives the conveyer belt low cruise; Conveyer belt drives this two generator rotations through frame for movement simultaneously, and generator sends voltage.When S3 is pulled automated location; K5 gets electric, and the original loop of leaning on R1 resistance given speed is changed into by generator B2 through 15,16 pin of K5 to the A element, is delivered in the controller through the resistance tap 10 in the A element; Given signal as main motor M 1; Because the voltage that sends of B2 is directly proportional with the rotating speed of driving screw, so its given signal of delivering to controller also is directly proportional with the rotating speed of driving screw, guaranteed the synchronous of feeding and screw speed.

The extruder screw material is also identical with the front fuselage lagging material.Wearability is good, and hardness is high; Screw-rod structure is the major-minor helicitic texture, and helical pitch is big.Junction, major and minor spiral shell position is adopted and is fed slow transition, makes all spoons of goods plasticizing, and production capacity is high, and the screw rod self-cleaning is good.

The screw rod of rubber exhaust cold feed extruder of the present invention; Its fluxing zone has adopted major-minor screw-type screw rod; It is made up of the major-minor screw thread that two helical pitches do not wait; The height of deputy thread plastifies the sizing material that demonstrates VISCOUS FLOW and can cross deputy thread spiral shell rib entering deputy thread dorsal part screw channel a little less than main thread, and the sizing material that plasticizing is good then continues to stay the positive side screw channel of deputy thread and further plastifies.Major-minor screw-type screw rod has strong shearing and plasticizing capacity, extrudes so can under high rotating speed, realize high-quality, and strong to the sizing material adaptability of processing, and have self-cleaning preferably, exhaust, the anti-thorax performance of sweeping.This screw rod was provided with unique horizontal rib structure before the exhaust section steam vent, see Fig. 8 for details.

The present invention proposes two kinds of horizontal rib schemes of improved screw rod, adopt split-type structural to solve the above problem of bringing because of the sizing material firmness change preferably.

Improvement project one:

Movable transverse rib structure is for the small dimension extruder, and its spiral shell rib is narrower, receives the restriction of installing space, and the suffered moment of torsion of screw rod is less relatively.For this reason, we adopt and directly make former horizontal rib position into dismountable movable transverse rib structure, see Fig. 9.

Its specific practice: the horizontal rib position original mills out mounting platform in advance; And process keyway and screw is installed; In order to guarantee that screw rod main body and movable transverse rib all have enough intensity and anti-shear ability; Section thickness slightly increases, and movable transverse rib bottom processes the key that cooperates with keyway, and is installed on the mounting platform that the screw rod main body mills out in advance with soket head cap screw.This structure adopts keyway connecting mode to guarantee that movable transverse rib can bear sizing material plasticizing and mixing moment of torsion and the shearing force of transmitting.The processing of movable transverse rib is also more convenient, and in general the movable transverse rib of three kinds of height of screw rod outfit specifications just can satisfy the instructions for use of most sizing materials basically.This features simple structure is prone to row, for the sizing material of different hardness, through changing the height specification of movable transverse rib, can change the gap delta value at horizontal rib and screw channel top, and problem is solved preferably.

Improvement project two:

Adopt two halves baffle ring structure.For the extruder of big specification, the moment of torsion that screw rod bore obviously increases, and must adopt the stronger structure of anti-shear ability, and two halves baffle ring structure proposes according to this requirement, sees Figure 10.

This structure mainly is made up of two location flat key and mounting screws that have keyway and two semi-rings that screw is installed, bear moment of torsion.Procedure of processing is following:

(1) the horizontal rib position car of screw rod goes out annular ditch groove, and processes keyway and screw is installed.

(2) have keyway and the full circle retainer ring that screw is installed by several of dimensioned that are complementary with annular ditch groove, from the centre it is separated into two semi-rings (semi-finished product) with the line cutting then and pairing is used.

(3) one group of two semi-ring (semi-finished product) is installed in soket head cap screw on the annular ditch groove of screw rod main body, goes out to meet the horizontal rib of certain sizing material hardness range by the screw channel Machining of Curved Surface of screw rod.

(4) change another to two semi-rings (semi-finished product) installation in position, in kind process the horizontal rib that meets another kind of sizing material hardness range.So can process the two halves baffle ring of the horizontal rib of many group differing heights specifications.

(5) material of two halves baffle ring is consistent with screw rod, and the surface ion nitrogen treatment is carried out with stove in the processing back.This structure is comparatively complicated, and process is also quite loaded down with trivial details.But, lean on keyway to bear the moment of torsion that the screw rod rotation produces, therefore especially suitable φ instructions for use of specification exhaust cold feed extruder greatly more than 150 owing to adopted annular ditch groove to bear the axial compressive force that sizing material plasticizing produces when mixing.For the sizing material of different hardness, through changing the two halves baffle ring of differing heights specification, can change the gap delta value at horizontal rib and screw channel top, reach a solution of a problem.

Applied Computer Techniques is optimized design to the main geometrical structure parameter of melt zone screw rod.The structural representation of common extruder screw is shown in figure 11.The spiral groove depth of melt zone shoals gradually, and this mainly is a function of shearing plasticizing in order to strengthen.

Traditional extruder screw, its lead angle θ gets 17.66 ° mostly, and among the present invention, θ * gets 22 °, is positioned at optimum valuing range.Research shows: groove depth is to the influence of Solid Conveying and Melting rate, and its best groove depth increases along with the increase of screw diameter.For example, when screw diameter is 30mm, H*1/Db=0.15; And when screw diameter is 65mm, H*1/Db=0.185.Among the present invention, screw diameter is 70mm, gets H*1=14mm, and promptly H*1/Db=0.20 meets the variation tendency that best groove depth increases along with screw diameter.The increase of screw flight top width degree can strengthen the shear action to material, helps the material fusion plastification, but increases power consumption simultaneously again.Span by aforesaid design parameter is known e=(0.08～0.12) Ds, among the present invention, and Ds=60mm.Like this, e=4.8～7.2mm, promptly the e* value is near higher limit.The screw rod melt zone rises, the optimum value of terminal spiral groove depth, spiral shell rib top width degree and lead angle is respectively 15mm, 4mm, 7mm and 22 °.

Warm water feelings loop systems is divided following five sections: head, fuselage deferent segment, fuselage fluxing zone, fuselage feeding section, screw rod.Every section temperature all can be controlled separately, is made up of five road independent loops, and is easy to maintenance, and reliability is high.This system adopts advanced controller funeral, and the stability of design temperature has designed low-voltage variation and heated protective for 1 ℃ of scholar (real work measure temperature and can reach ± 0.2 ℃) in the system, make system works safe and reliable.

This system is made up of major loop and cooling circuit.Major loop is formed closed loop by cooling tank, heating tank, pump, workspace and water injection pipe; Cooling circuit is made up of magnetic valve and cooling tube.The A point is a heating rod system point, and the B point is the cooling control point, all adopts time scale PID control.

When the workspace temperature was on the low side, heating rod began heating, adds heat and is provided by pid algorithm; During the workspace temperature drift, magnetic valve is opened, and cooling circuit is started working, and heat unnecessary in the major loop is taken away, thereby made temperature constant at setting value soil.

This system is provided with low-voltage variation, crosses when low when anhydrous in the loop or hydraulic pressure, and circulating pump and heater can't be worked, and can prevent that heater from adding cause thermal damage and damaging circulating pump because of the water vapor of low-pressure water major loop under anhydrous state.System also is provided with heated protective, promptly when pump does not turn round, can not heat, and prevents the stagnant water heating.But temperature control instrument display setting temperature, actual temperature and temperature control duty.

The laser diameter measurement device is positioned at the head gum outlet, when the steel wire that has wrapped glue is strengthened sebific duct through the laser diameter measurement place, promptly statistics have shown on the operating desk.This production line of caliper and control system adopts the caliper on-line measurement to extrude the sebific duct overall diameter.Caliper is placed near the cross-head; Can obtain metrical information as soon as possible; The output control signal is given the front and back hauling machine after the measurement result process internal proprietary Computer Processing, they is carried out Synchronization Control, to proofread and correct the deviation that sebific duct produces in extrusion.This control system can eliminate any long-term variation quite effectively.The technical parameter of caliper is following:

Measurement category 0.1～60mm

Resolution ratio 0.01mm

Accuracy＜0.02mm

200 s-1 of scan frequency

Control mode PID

Output signal 0～10DCV

Draw-gear comprises pre-traction device and rear towing device, and the two structure is basic identical.Pre-traction device is put by alternating current generator distribution transforming speed governing frequently bag and is driven, and holds the steel wire reinforcement sebific duct that has printed trade mark by two slat gum strap clamps and carries to devices for taking-up.The linear velocity of pre-traction device directly influences the encapsulate thickness that steel wire is strengthened sebific duct.Under the constant condition of screw speed, hauling speed is accelerated, then rubber layer wall thickness attenuation. and the wire spirally-wound hose external diameter diminishes; Hauling speed slows down, and then the rubber wall thickness increases, and steel wire is strengthened the sebific duct external diameter and become big.Otherwise when hauling speed was constant, the variation of screw speed also can directly influence the thickness that twines rubber adhesive.Therefore, in the laser diameter measurement automatic feedback system, the linear velocity of screw speed and front haulage machine is two main variablees.Rear towing device is equipped with RHVC with alternating current generator and drives, and is mainly used in arrangement and conveying before glue core or steel wire are strengthened sebific duct input cross-head afterbody, holds glue core or steel wire by two slat gum strap clamps and strengthens sebific duct and import to the head rear portion.This device can be regulated through mechanical driving device for the work hypermutation.

Hauling machine provides and makes soft core and the sebific duct power of operation continuously, and its ruuning situation directly affects the quality of product.In this production line, two hauling machines before and after having used altogether, their synchronous operation under the control of caliper, its major technique

Parameter is following:

Bandwidth 95mm

Traction clamping length 600mm

Operating rate 0～35mmin-1

Speed stability＜10-3

Power of motor 2.2kW

0～200mm is adjustable in the clamping belt gap

Prevent that in order to guarantee soft core to derive and extrude the back smooth rolling of sebific duct smoothly sebific duct from stretching or pile up, in production line specialized designs constant tension device, guaranteed sebific duct running status stable in production line.Squeeze under the stable prerequisite of gel quantity and sebific duct running status in production line at extruder, will be controlled effectively the overall diameter of sebific duct by the closed-loop control system that two hauling machines of caliper and extruder front and back constitute, control accuracy reaches ± 0.1mm.Before and after the speed of two hauling machines be not synchronous, but it is poor to have certain speed, this has overcome effectively because two hauling machines are asynchronous and the error brought owing to the shake of hauling speed, has improved the precision of extruding of production line greatly.

In order to make sebific duct not adhesion mutually in sulfidation, before curling, must on tube wall, be coated with the last layer interleaving agent.This device adopts the spray mode, and compressed air blowing dry device is housed, and is coated in the separation layer thickness on the sebific duct through adjusting compressed-air actuated air quantity adjustment.

Lead out and devices for taking-up, the effect of unwinding equipment is that soft core or interior glue are derived from rotary drum, and the effect of devices for taking-up then is that the sebific duct of extruding fitly is wrapped on the rotary drum.These two devices all have power.For guarantee this two covering device can with whole production line synchronous operation, designed tenslator, and with lead out and devices for taking-up constitutes closed-loop system, make sebific duct keep permanent tension force in process of production, guaranteed the stable of production process.

The present invention has designed high-precision temperature control system; Make each section of extruder control accuracy of temperature reach ± 1 ℃; The closed-loop control system of utilizing a high-temperature fusant pressure transmitter, PID single-loop regulator and RHVC to constitute simultaneously; Accurately the control screw speed is to guarantee the cross-head pressure stability, and control accuracy is ± 0.1MPa.

Extruder control system is shown in figure 13, mainly is made up of frequency converter, PLC, 5 stack shell heaters, 6 Temperature Detectors, and it mainly accomplishes following function:

1. blanking amount adds special confession amount device scalable, metering, demonstration.

2. cooling water electric control valve ZAZP or small-bore electrical ball valve in the screw rod.

3. engine speed, electric current, manual, automatic adjusting, warning, output offer the hauling machine signal when stopping.

4. the barrel temperature signal is imported the master control computer.

5. gear-box oil pressure monitoring.

6. other (interior cooling water pipe fouling, raw material are overheated, cold excessively, caking etc.).

When big problem takes place when, increase considerably or decline, main frame material plug, main motor shutdown etc. like conveying capacity, extruder control system can reflect and adjust hauling machine rapidly.

Extruder hauling machine control system is made up of frequency converter, PLC, pipe range detection rotary encoder, pipe thickness detector, and shown in figure 14, it mainly accomplishes following function:

Have when 1. starting shooting manually and change, select, confirm and input setting benchmark numerical value with automatic.

2. according to the pipe thickness deviation from motion tracking, the adjustment hauling speed.

3. show, set pipe thickness.

4. the electric current, the rotating speed that show hauling machine.

5. have overcurrent, overvoltage, traction pawl and skid, draw protection, warning and fault self-diagnosis functions such as chain rupture, traction off-axis.

6. with extruder speed synchronization, interlocked control function are arranged, when extruder material plug or idle running or shutdown for some reason, hauling machine quits work automatically.

In the freezing link of sebific duct subsequently, comprise the Detection & Controling of cryogenic temperature; The freezing degree of sebific duct, the i.e. Detection & Controling of sebific duct hardness.And sebific duct hauling speed and the coordination control of hauling speed in earlier stage.

Twine link at sebific duct, emphasis is realized the automation adjustment of sebific duct controller, and the automatic control of haulage gear.Employing winding and traction be the independent motor transmission system respectively, and the revolution by advanced person's control system controls two motors through adjusting the coupling that the control system accomplishes winding revolution and hauling speed, satisfies the needs of sebific duct winding process.And be provided with automatic broken string, intact line lugs.

Master station is the core of whole production line, can operate and control all equipment, and show the various running parameters of production line.Recorder can write down the situation of change of cross-head pressure in the production process and sebific duct overall diameter automatically.Central processing unit is monitored the working condition of each system in real time, guarantees the whole production line coordinated operation.

The strength motor that drives that adopts is a dc motor, and electric-control system is set up the eleventh of the twelve Earthly Branches jointly by silicon controlled rectifier transmission cabinet and electric operation.Host-initiated is arranged on the operating desk, stop and main electrical power, electric current, voltage etc. show signal and Displaying Meter totally two covers.Also be provided with pump start and stop button on the operating desk, pump start and host-initiated interlocking starts under the oil pump duty guaranteeing

The control of main frame, screw speed are silicon controlled rectifier control, can be in 5.5-55r/min stepless speed regulation.Control circuit is provided with main motor overload protection.Also be furnished with switch and the Displaying Meter of handling subsidiary engine on the operation board, have forward and backward hauling machine linear velocity adjusting knob and linear velocity numeral to show, sizing material pressure numeral shows in the head, is demonstrated the number implement and the recorder of semi-finished product external diameter by the laser diameter measurement feedback.Display precision is 0.01mm.Calculating arrangement through to linear velocity, laser diameter measurement and the related data of forward and backward hauling machine in the production process provides Mathematical Modeling.Behind given sebific duct external diameter, show and feed back to forward and backward traction electric machine through laser diameter measurement, can reach self-regulating purpose, thereby reach the given sebific duct diameter of design.

Claims (10)

1. sebific duct extrusion linkage production method and device thereof comprise soft core let-off gear(stand), front haulage machine, cold feed extruder, power cabinet, temperature control system, caliper, chilled water unit, rear haulage machine, separant coating machine, twin shaft winder, master console, tensioner.

2. a kind of sebific duct extrusion linkage production method according to claim 1 and device thereof; It is characterized in that: adopt the rubber tube tire to extrude and automatic control technology; The cold setting of plastics and the cold setting of rubber tube tire and coiling and observation and control technology, development sebific duct pipe tire is extruded and synchronous interaction control and detection production line.

3. a kind of sebific duct extrusion linkage production method according to claim 1 and device thereof; It is characterized in that: described sebific duct is extruded hauling machine; Be provided with some groups of stack shell heaters, Temperature Detector, head pressure sensor, form the control system that extrudes with frequency converter, PLC.Its control system is made up of frequency converter, PLC, pipe range detection rotary encoder, pipe thickness detector: be provided with manual and automatic conversion, selection, definite and input setting benchmark numerical value; According to the pipe thickness deviation from motion tracking, the adjustment hauling speed; Show, set pipe thickness; The electric current, the rotating speed that show hauling machine; Be provided with overcurrent, overvoltage, traction pawl and skid, draw electromechanical components such as protection, warning and fault self-diagnosis such as chain rupture, traction off-axis.

4. a kind of sebific duct extrusion linkage production method according to claim 1 and device thereof; It is characterized in that: this automation sebific duct extrusion linkage production line is provided with the overall intelligence monitoring system; Adopt sensors such as temperature, pressure, infrared ray or ultrasonic wave; Based on the main control unit of single-chip microcomputer or PLC, adopt field bus technique, upper industrial computer is set; Design can realize various parameter measure and adjust and screen display function; And the information fusion of each road sensor signal and intelligent decision judge system, the handled easily personnel with the change of manufacturing technique requirent adjustment at any time produce the parameter of train line, and can realize various intelligent faults are reported to the police and the fault based on expert database is got rid of Quickstart.

5. a kind of sebific duct extrusion linkage production method according to claim 1 and device thereof; It is characterized in that: be provided with the caliper that the sebific duct overall diameter is extruded in on-line measurement near the cross-head; The output control signal is given the front and back hauling machine after the measurement result process internal proprietary Computer Processing; They are carried out Synchronization Control, to proofread and correct the deviation that sebific duct produces in extrusion.

6. a kind of sebific duct extrusion linkage production method according to claim 1 and device thereof; It is characterized in that: be provided with a kind of right-angle handpiece extrusion system; The casing of its cross head extruder is installed the sub-assembly of a fixed center, and there are two controllable temperature sections the front of right-angle handpiece body.

7. a kind of sebific duct extrusion linkage production method according to claim 1 and device thereof; It is characterized in that: described screw rod; Its fluxing zone has adopted major-minor screw-type screw rod, is made up of the major-minor screw thread that two helical pitches do not wait, and the height of deputy thread is a little less than main thread; Plastify the sizing material that demonstrates VISCOUS FLOW and can cross deputy thread spiral shell rib entering deputy thread dorsal part screw channel, this screw rod was provided with unique horizontal rib structure before the exhaust section steam vent.

8. a kind of sebific duct extrusion linkage production method according to claim 1 and device thereof is characterized in that: described warm water feelings loop systems is divided following five sections: head, fuselage deferent segment, fuselage fluxing zone, fuselage feeding section, screw rod; Every section temperature all can be controlled separately, and this system is provided with circulating pump water low-voltage protection device and stagnant water heating protecting device.

9. a kind of sebific duct extrusion linkage production method according to claim 1 and device thereof is characterized in that: described cross-head gum outlet place is provided with laser diameter measurement and numeric display unit.

10. a kind of sebific duct extrusion linkage production method according to claim 1 and device thereof is characterized in that: described extruder traction is provided with constant tension device with the system of curling, and constitutes closed-loop control system by two hauling machines before and after caliper and the extruder.

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