CN85104554A

CN85104554A - The equipment of the cover tire of manufacturing doughnut or other section bar, band

Info

Publication number: CN85104554A
Application number: CN85104554.5A
Authority: CN
Inventors: 迪特尔马·安德斯
Original assignee: Hermann Berstorff Maschinenbau GmbH
Current assignee: KraussMaffei Berstorff GmbH
Priority date: 1985-06-14
Filing date: 1985-06-14
Publication date: 1986-12-10
Also published as: CN1003292B

Abstract

The present invention makes the cover tire of doughnut or other section bars of being made by rubber, synthetic rubber, thermoplastic, the equipment of band, and structure is very compact, easy operating, and cleaning is fast.This target realizes by following measure.The position of the roll of single roll mill head will make upwards after the swing, can pull down worm screw to upper part of head section; The point of rotation of upper part of head section swing is located on the head; Upper part of head section is quick lock on the operating position; Between head section that faces toward roll and roller surface, keep a gap.

Description

The equipment of the cover tire of manufacturing doughnut or other section bar, band

The invention belongs to the equipment of the cover tire of making doughnut or other section bar, band, in claims, elaborate.

Known in the European patent document 0005077 being a kind of so-called single roll mill head of making rubber or like product.

The pressurizing unit that comprises head, breaker roll is done relative motion under the situation that breaker roll keep-ups pressure, and is inserted with a support plate between roll and head, and it is by a kind of self-lubricating material, and for example molybdenum sulfide or polytetrafluoroethylene are made,

Facts have proved that this support plate is bad, because support plate and roll have all produced wearing and tearing.Particularly have such shortcoming, promptly material build between support plate and roller surface makes support plate press to head owing to rubbing and giving plus-pressure like this, thereby causes prevulcanization, even burning.Residue after the burning can cause the severe contamination of fabircated shapes or band again.

Another shortcoming of single roll mill head is that in order to change mixture and to carry out the head cleaning work, whole head must remove.Even help axle when breaking away from head in the horizontal direction when the roll nationality, as head not being pulled down earlier, just worm screw can not be pulled down from extruder.

The objective of the invention is, improve the single roll mill head of on European patent document, being introduced.Particularly will obtain the greatly compact single roll mill head of a kind of structure, operation is wanted easy and can be cleared up apace head when the transposing mixture.

This purpose is on an equipment according to claims design, and the characteristic that is proposed by claims has solved.

Because the minimum rate of accumulation of the extruder cylinder-bore (worm screw promptly is positioned at wherein in feeding) that roll flatly is disposed across before the head and install a little less than level, thereby after upper part of head section is moved up, just worm screw can be split out from the extruder cylinder, so that thoroughly clean or change worm screw., need not change, because worm screw is pulled out the side from it for the roll that is positioned at the head front for this reason.

In order to make single roll mill header structure compactness, the swing connecting bar of upper part of head section and the used hydraulic cylinder of generation wobbling action are contained in upper part of head section or housing sidepiece, rather than according to prior art it are contained on the flange of extruder cylinder.Guaranteed that by this measure the structure of this head can make very compactly and can be fixed on any extruder with flange, and needn't originally do any special preparation on one's body at extruder.

About a specific question of the quick operating aspect of head just can with the side housing lockout issue of the upper part of head section of swing upwards because high pressure up to 250 crust is arranged in head, so have very big spillage risk.Design compact conformation that a kind of like this locking device also will keep the single roll mill head and be difficulty especially.The cost that this having only is very high adopts the way that clamps upper part of head section and lower part usually in the side could realize, for example in patent DE-AS2457532 that Fig. 7 and Fig. 8 introduced was such.

This problem can be easy to according to the present invention and solve effectively, and the wedge shape locking device that is about to hydraulic pressure or air-operated control is fixed on upper part of head section, and the voussoir one right one left ground of two tapers outwards is pressed in the bellmouth of side housing.Because voussoir and hole have tapering, upper part of head section just can very big pressure be close on the head lower part and has good sealing.

A kind of like this device that head is locked on the operating position only needs very little space, thereby this way can guarantee that the structure of head is very compact.

Another measure that makes the handpiece structure compactness is to make to be disposed across the preceding roll bearing of head in the side housing of head.This measure can make the location on extruder spout template breaker roll surface accurate.This is (for example under the spout template situation of changing extruder) that can accurately reappear at any time, as long as upper part of head section compresses the head lower part by wedge shape locking device.

This measure is a significant improvement to the head that is proposed in the European patent document 0005077, has just removed the support plate by lubriation material system between head and the roller surface.So also prevented the wear damage of support plate itself and roll.

Surprisingly, facing to the method for arranging that maintains a gap between the head section of roll and roller surface, after the peripheral speed of expulsion pressure in the head and roll being carried out adjustment, the discharging width of section bar and band is remained within the quite little margin of tolerance.

Except head section and roll facing to roll are kept the gap, also measure the expulsion pressure in the head, and, can reach better effect for from the discharging width of head adjusted section bar or band and a control device that is used to influence the rotating speed of roll speed or extruder worm screw is set.For example, can measure in the head material pressure and according to these data by a controller influence roll peripheral speed and (or) rotating speed of worm screw.

Also can by means of the edge of photodiode monitoring section bar or band and with transfer of data in a controller, peripheral speed that then can breaker roll and (or) rotating speed of worm screw regulates accordingly.

By this measure,, as start said those shortcomings and all can avoid for example causing thus described in the European patent document with the roll of molybdenum sulfide system and the support plate between the head forward part and all.

The task of the support plate that is proposed in European patent document is to form the side that reaches section bar discharging width.Can avoid making the material that squeezes out to spill from the side by means of this support plate, and make the product that from head, squeezes out have same width all the time.During extrded material, must act on certain pressure to the side of support plate, so just be difficult to have with avoiding small quantity of material be forced into support plate below, and owing to friction is burnt, thereby produce very bad consequence.

According to the present invention, can be by the peripheral speed of measuring the pressure in the head and regulating roll according to this pressure.So just can save support plate at side surrounding.When force value raise, the peripheral speed of roll also improved slightly, like this, just has more material to extrude from head, thereby pressure just can lower again at an easy rate, and simultaneously, the discharging width of section bar also reduces.

When improve owing to roll speed when having more material from the outlet of nozzle, to flow out (outlet be by following roll and above shaping template constitute), section bar or the band then extruded narrow down, when the peripheral speed of roll was slack-off, section bar or band just broadened.

Can be automatically and regulate the discharging width of rubber profile or band exactly by this measure, and mechanically the inserting side to sealing plate or similarity piece.

In addition, the lateral seal plate between roll and head front portion also has another shortcoming, promptly when needs change width, must insert one group of new sealing plate, like this, can make to produce and interrupt.

By as described in patent claim 2 and 3, the additional method that a control device is set, in conjunction with the shaping template that is used for various different head discharging width, the width value of the extrudate that just can be only records according to the material pressure in the head with by photodiode, control the peripheral speed of roll and the rotating speed of worm screw (emitted dose of extruder just) and automatically extrude the width of any section bar and band, and do not need to be provided with the side shrouding.

Owing to have a feature described in the patent claim, owing to adopted some to influence each other, promotes and additional individual event measure, total effect of acquisition is considerably beyond taking the obtainable effect of individual event measure.

The present invention will obtain the very compact single roll mill head of structure, simultaneously in its function aspects, for example leak, and the precision aspect of the band of section bar and extrusion also will obtain very outstanding effect.In addition, the operation of head is also extremely easy, because head can move up soon (unclamping the wedge shape locking device of side, the rising upper part of head section), like this, makes the cleaning work of head again and change worm screw greatly easy.

Be the example of structure of a kind of excellence of the present invention shown in the figure, accompanying drawing is as follows:

Fig. 1: the skiagraph of single roll mill head.

Fig. 2: Fig. 1 is along sectional drawing that II-the II line is got.

The single roll mill head is made up of an extruder 6, head 2 and roll 3.

Head 2 is made up of a lower part 4a and a top 4, and top 4 nationalitys help hydraulic cylinder 6 can be around upwards swing of swing connecting bar 5.Hydraulic cylinder 6 has two interlocks or fixing point, one be on upper part of head section 4 30, another be on side housing 20 or 19 29.

Nationality helps hydraulic cylinder 9 and coupled pillar 10, and the shaping template 11 of replacing is remained on its position very firmly.

Upper part of head section 4 can be pressed the direction swing shown in the arrow 12.

A base 14 is arranged in the wedge shape locking device of the upper part of head section shown in Fig. 2, hydraulic cylinder 15 and 16 are housed in two sides of this base.

Voussoir 17 and 18 is fixed on the hydraulic cylinder.Voussoir for example can be taper, matches with hole 17a and 18a with same tapering in side housing 19 and 20.

Figure 2 shows that voussoir 17 withdraws from from the 17a of hole, voussoir 18 then is arranged in hole 18a.Promptly on latched position.

The unlatching of head 2 is performed such, and at first voussoir 17 and 18 is withdrawed from the housing 19 and 20 from the side, and operating hydraulically operated then cylinder 6 makes upper part of head section 4 lift around swing connecting bar 5 by the direction of arrow 12.

Preparation that need not be other can be carried out the cleaning work of head now, and more resleeve or template pull out the worm screw of extruder and change.

After these end-of-jobs, upper part of head section 4 nationality again helps two-way function hydraulic cylinder 6 and moves down, and voussoir 17a in the housing bore and 18a are stretched out and locks, and so just can guarantee the right as rain locking of head.

Owing between head section that faces toward roll and roller surface, a gap is arranged, for example between the 50-500 micron, after the expulsion pressure of device and the peripheral speed of roll were adjusted, the discharging width of section bar or band just can very well remain in the little margin of tolerance.

If like this through beyond the state of adjusting, but not necessarily checkout gear is measured and regulated accordingly, then the single roll mill head just can move automatically.

In passage 23, material pressure can reach 250 crust, and this pressure nationality helps pressure-measuring device 22 and records, and with controller 24 it is noted.

Controller 24 is according to the force value that records, and can control the transmission mechanism of the roll 3 that is not described further in the drawings.When pressure was higher than predetermined pressure, the transmission mechanism of roll 3 will be slightly (or correspondingly) improved the peripheral speed (being up to 2%) of roll 3, so that there is more material to export from head inner chamber 23.Like this, the width of section bar and band diminishes, till the width that reaches regulation.

The width that is accurate to millimeter of section bar 27 obtains by trimming device.Trimming device is made up of a cutting knife 26 and driven cutting roller 25.The position of cutter makes it also can carry out the cutting of tilting with operative orientation.

Controller 24 also can be according to the transmission device of a unaccounted worm screw 21 of the control of the force value in the measured head cavity 23, so that when surpassing a certain force value, reduce the speed (for example mostly being most 2%) of worm screw slightly, like this, the conveying capacity of extruder just correspondingly lowers, pressure in the head cavity 23 just descends, the section bar width of extruding from head narrows down under the situation that the peripheral speed of roll remains unchanged slightly, also reduces to cause the side cut amount.

By the way of measuring pressure with pressure-measuring device 22 its breaker roll peripheral speed and worm screw rotating speed are exerted an influence, just can reach:

(1) head and roll can keep a little gap, and these two parts do not need each other and give pressure.

(2) there is not the problem (wearing and tearing on the roll of intermediate plate and rotation) of increased pressure board or scuff panel fully, referring to European patent document 0005077.

(3) do not build up material between increased pressure board and roller surface, this position will produce superthermal load and can cause severe contamination.

Like this, just no longer needed the side seal plate.

Another program is that the width of the band 27 that comes out from head also can be measured in the both sides of band by photodiode 8.When the width of band or section bar increases, the peripheral speed that influences roll 3 by the controller 24 that is connected with photodiode 8 with (or) rotating speed of worm screw 21.

Claims

1, makes the cover tire of doughnut or by other section bar of rubber, synthetic rubber and thermoplastic system, the equipment of band, it is made up of a material forming nozzle that is positioned on the extruder material outlet, the nozzle outlet has the housing of removable template by one and the roll vertical with the nozzle outlet of a rotation constitutes, and it is characterized in that:

The roll (3) that level is installed is a little less than the minimum rate of accumulation (28) of extruding cylinder body one endoporus of level installation;

The swing connecting bar (5) that can make upper part of head section (4) produce swing is installed on the head (2),

The hydraulic pressure of upper part of head section (4) generation swing or the impetus (29,30) of pneumatic cylinder (6) are positioned on the housing (19,20) of upper part of head section (4) and side,

Upper part of head section (4) in working order the time can by be positioned in the opening wherein and side housing (19,20) (17a, wedge shape locking device (15,16,17,18) locking 18a) and available hydraulic or air-operated control,

The bearing (31) of roll (3) is fixed on the head lower part (4a),

Facing to the head lower part of roll (3) (4,4a) and a gap arranged between the roll upper surface.

2, equipment according to claim 1 is characterized in that:

The control device of one adjustable type material or band discharging width is housed on head (2), and it is to be made of a pressure-measuring device (22) that is contained in the head inner space (23);

Pressure-measuring device (22) links to each other with a controller (24);

The transmission device of controller (24) and roll (3) with (or) transmission device of extruder worm screw (21) links to each other.

3, equipment according to claim 1 is characterized in that:

The control device of the discharging width of adjustable type material or band is housed on head (2), and it is to be made of the photodiode that band edge is monitored (8);

Photodiode (8) links to each other with controller (24);

The working condition of controller (24) breaker roll (3) and (or) working condition of extruder worm screw (21) controls.