Mounted Single Screw

Detailed description of twin screw extruder

A twin screw extruder has a casing with a working direction, two partially intersecting casing bores, which are parallel to each other, two shafts, which are disposed in the casing bores and which are drivable to rotate in the same direction of rotation about an axis of rotation, the axes of rotation having a distance A from each other, and single-flight kneading disks, which are fixed on the shafts and have surface lines extending parallel to the respective axis of rotation. The kneading disks, in a cross-section perpendicular to the axis of rotation, have a crest, which is formed as a segment of a circle about the respective axis of rotation and which has a crest angle b and a radius RA, a bottom, which is formed as a segment of a circle about the respective axis of rotation and has a bottom angle g and a radius RI and two flanks, which join the crest and the bottom, RA >RI, A≅RA +RI and 0°ࣘbࣘ45° applying.
Claims

What is claimed is:

1. A twin screw extruder (1) comprising

a casing (5) with a working direction (2);

two partially intersecting casing bores (16, 17) disposed in the casing (5), which are parallel to each other;

two shafts (22, 23), which comprise each an axis of rotation (20, 21), which are disposed in the casing bores (16, 17) and which are drivable to rotate in a same direction of rotation (18, 19) about the respective axis of rotation (20, 21), the axes of rotation (20, 21) having a distance A from each other; and

single-flight kneading disks (25, 26), which are fixed on the shafts (22, 23) and have surface lines (27, 28) extending parallel to the respective axis of rotation (20, 21), the kneading disks (25, 26), in a cross-section perpendicular to the axis of rotation (20, 21), comprising

a crest (31), which is formed as a segment of a circle about the respective axis of rotation (20, 21) and which has a crest angle b and a radius RA ;

a bottom (32), which is formed as a segment of a circle about the respective axis of rotation (20, 21) and has a bottom angle g and a radius RI ;

two flanks (33), and which join the crest (31) and the bottom (32);

RA >RI and A≅RA RI applying;

wherein 0°≤b≤45° applies to the crest angle b.

2. A twin screw extruder (1) according to the claim 1, wherein 3>≤b≤20° applies to the crest angle b.

3. A twin screw extruder (1) according to claim 1, wherein 3°≤b≤10° applies to the crest angle b.

4. A twin screw extruder (1) according to claim 1, wherein each kneading disk (25, 26) is formed in mirror symmetry to a central longitudinal plane (37, 38), which extends through the respective axis of rotation (20, 21) and through the center of the crest (31).

5. A twin screw extruder (1) according to claim 4, wherein two of said kneading disks (25, 26), which are disposed on said two shafts (22, 23) in the same cross section, constitute a pair of kneading disks (39), the central longitudinal planes (37, 38) of the kneading disks (25, 26) of a pair of kneading disks (39) enclosing an addendum modification angle z so that the kneading disks (25, 26) do not block each other upon rotation in the same direction about the axes of rotation (20, 21).

6. A twin screw extruder (1) according to claim 5, wherein

(bE -b)≤z≤ (bE -b) applies to the addendum modification angle z, the angle bE being defined as bE =180°-2 * arccos {0,5 * [1 1/(RA /RI)]}.

7. A twin screw extruder (1) according to claim 4, wherein the central longitudinal planes (37, 38) of two of said kneading disks (25, 26), which directly adjoin in the working direction (2) on one of said two shafts (22, 23), enclose an offset angle e.

8. A twin screw extruder (1) according to claim 7, wherein the kneading disks (25, 26) of at least one of said two shafts (22, 23) are offset in the working direction (2) by said offset angle e counter to the directionof rotation (18, 19) for conveyance in the working direction (2), 0°>|e|>180° applying.

9. A twin screw extruder (1) according to claim 7, wherein the kneading disks (25, 26) of at least one of said shafts (22, 23) are offset in the working direction (2) by said offset angle e in the direction of rotation (18, 19) for conveyance against the working direction (2), 0°>|e|>180° applying.

10. A twin screw extruder (1) according to claim 7, wherein the kneading disks (25, 25', 25", 25'") of one of said two shafts (22) are offset in the working direction (2) against the direction of rotation (18) by said offset angle e with in |e|>180° applying and wherein the kneading disks (26, 26',26", 26'41 ) of the other of said shafts (23) are offset in the working direction (2) in the direction or rotation (19) by said offset angle e, with |e|>180° applying.

11. A twin screw extruder (1) according to claim 7, wherein the kneading disks (25, 26) of the two shafts (22, 23) are disposed in the same direction, however at varying values for said offset angle e.

12. A twin screw extruder (1) according to claim 1, wherein the kneading disks (25, 26) have a radial play SRA in the casing bores (16, 17).

13. A twin screw extruder (1) according to claim 12, wherein for the production of the radial play SRA in the casing bores (16, 17) is increased while the profile of the kneading disks (25, 26) remain constant.

14. A twin screw extruder (1) according to claim 12, wherein for the production of the radial play SRA, the radius RA is made smaller while the diameters of the casing bores (16, 17) remain constant.

15. A twin screw extruder (1) according to claim 12, wherein for the production of the radial play SRA, the radius RA is reduced and RI is increased, the ratio RA /RI thus being smaller, while the diameters of the casing bores (16) remain constant.

16. A twin screw extruder (1) according to claim 12, wherein the kneading disks (25, 26) are mounted eccentrically with respect to at least one of said two shafts (22, 23).

17. A twin screw extruder (1) according to claim 1, wherein the axes of rotation (20, 21) are formed to have a center to center play SA, A=RA RI SA applying.

About the Author

A twin screw extruder has a casing with a working direction, two partially intersecting casing bores, which are parallel to each other, two shafts, which are disposed in the casing bores and which are drivable to rotate in the same direction of rotation about an axis of rotation, the axes of rotation having a distance A from each other

Archery And A Slant Of Archery Requisites

Archery and a Catalog of Archery Terms: When we think in this area all Archery has to offer we don't permanently look by terms.So now we want take a look by approximately of the stipulations used inside Archery and think it over where they themselves correspond.Whether your debate Shortbow, Longbow otherwise individual other type of matter with the target of has to sort absent with Archery.It is a skilled conviction to succeed favored physically with the stipulations used.

A: A/C/CAluminium/Carbon/Competition arrow shafts made by 'Easton'.Made of multiple layers of carbon graphite fibres inside a epoxy resin wrapped ended a distinguished strength aluminium saloon (0.2mm thick).The code records printed on the prevent indicate its size:eg.3-71/300 where 3 is the numeral of carbon layers, 71 is the take up again two digits of the primitive aluminium shafts thickness inside thousandths of an creep (0.271") and 300 is the spine of the arrow inside thousandths of an crawl.Present are direct variety of points and nocks pro this arrow rod.These shafts are lighter than the 'Ultra-Lite' Aluminium shafts.A/C/EAluminium/Carbon/Extreme arrow shafts made by 'Easton'.Made much the same equally the A/C/C arrows, apart from the shafts are 'barrel-shaped', being thicker inside the centre of the hinder and tapering by all last part.This creates a much lighter and stiffer arrow.The code information printed on the stop indicates its size:eg.

1206G/370 where 12 is the diameter of the aluminium straightforward with the exception of measured inside 64ths of an inch, 06 is the aluminium shafts thickness measured inside thousandths of an inch, G indicates the develop run and 370 is the spine of the arrow inside thousandths of an move slowly.At hand are purpose variety of points and nocks pro this arrow ray.These shafts are lighter than the A/C/C shafts.Real Inducement WeightThe measured otherwise calculated inducement consequence of an Archer.a manifest bow of 30 lbs.by 28" inducement when used by a person having a 27" inducement part mean be located inflicted with an real inducement consequence of 28lbs.(a 1" difference inside inducement part feel like induce on to approx.

2 lbs.difference inside pull consequence.) AimTo overlie a observe pin on the centre of a target or, when not using a sight, the placement of the tip of the arrow on a particular top pro a agreed distance.AnchorA combination of points to which the bowstring and/or pointer finger of the drawing hand are drawn to on the visage and shaft.Join pointDefinite deprave on the archers body, normally the face, on which thread and pointer finger occur to remnants.

ArbalestA medieval crossbow with the aim of looked-for a windlass to pull the bowstring back.Arm guardA slice of stiff material used to thought representing the bow arm from the slap of the bow thread during the head release, worn on the inside of the bow arm.Arrow CaseA box of clump otherwise other material to big money and entail arrows.All arrow being held separate either via foam, slots otherwise clips to forethought on behalf of the feathers otherwise vanes.

Arrow plateA plate, variable otherwise fixed, to which the arrow surplus is attached.A discontinue of horn, shell otherwise leather solely superior than the soubriquet of a longbow where the arrow passes equally it leaves the bow.Arrow top otherwise pileMetal top inserted into purpose of arrow bore.Can furthermore befall with the goal of the stop fits inside the top equally inside wooden shafts and approximately carbon shafts.Arrow restA projection otherwise support on the bow otherwise the arrow plate located inside the bargain window on which the arrow fabrication when nocked on the bowstring.

ArrowsmithA person who makes metal arrowheads.AschamA tall narrow cabinet inside which bows and arrows are kept.AxleThe impact pin holding the veer inside the limbs of a compound bow.(The part of a compound bow is measured from top axle to underside axle).B: BackThe feature of the bow away from the bowstring.

Backed BowA bow which has been backed with rawhide, wood, fibre otherwise sinew.BallistaA very generous medieval crossbow used by an army attacking the walls of a inundated town.This crossbow was competent of firing generous rocks and spears lengthy distances.BarebowThe restraint of shooting lacking a bow sight, stabilisers and relief aid.

Low otherwise BastThe twisted straw back of a straw mat target butt.BellyThe feature of the bow next-door the bow string.Currently called the 'face'.Frank pointUsually a conical rubber arrow top with a flat tire tip designed not to consent to the arrow infiltrate a target, but very bounce off.

Bob-tailed ArrowA arrow with the intention of is thicker by the point.It tapers to the nock end and the hand crossbows 60lb is kind of the great thing on this case.BodkinA medieval type of arrowhead designed to spurt through shielding chainmail otherwise armour ordinarily worn by Knights.BoltA fleeting arrow used inside a crossbow.

Bow armThe arm with the intention of holds the bow.Bow handThe hand with the intention of holds the bow.BowhunterA person who hunts animals using a bow.In Australia, single feral animals could befall hunted.Native animals are protected.Popular feral animals hunted are; wild pig, goats, foxes, deer and fill up buffalo.

Bow sightA mechanical device attached to the bow with which the archer can take aim frankly by the target.Bow slingA leather otherwise nylon strap, secure to either the bow otherwise the archer's hand, which prevents the bow from falling to the ground when the archer shoots lacking mesmerizing the bow.BowstringA multi stranded thread of either Dacron, Kevlar otherwise Fastflight looped to the bow nocks otherwise teardrops.Bow stringerCord with two pockets of dissimilar size otherwise lone sack and lone saddle, used to thread a recurve bow.

Bow staveA cut of lumber used to get on to a bow.Bow squareT-Shaped device to rate brace height and nocking top location.BowyerA person who makes bows.Brace heightShortest distance from the thread to the pivot top of the bow when strung.

(Old English : Fistmele).BracerA first name used pro an armguard.Ordinarily used to explain the leather armguard used with a longbow.BroadheadA arrowhead with triangular shaped cold blades used pro hunting animals.

BubbleSee 'level'.Strike (Target Butt)Any backstop to which a target visage is attached.C: CablesThe plastic covered steel cables with the intention of join the thread via the cams otherwise wheels to the opposite limb of a compound bow.Cables can furthermore befall made of Fastflite thread material.

CamsThe wheels on a compound bow be inflicted with a 'cam shape' to lone feature with the intention of controls the amount of force and the affect of the draw/force curve of the bow.Many uncommon cam shapes are unfilled to point out from;eg.Hoyt's 'Accuwheel' easy cam, easy shooting pro target archers,'Performa Cam' basic cam, supplies most energy pro bowhunters.CantTo call the bow to the aptly otherwise missing while by satiated draw.

The reference to aptly otherwise missing is single-minded by the spot of the top limb.CastThe distance a bow can force an arrow.Centre servingThe shielding winding on the centre of the thread where the arrows are nocked.Centreshot bowA bow where the find window has been graze earlier period the bow's centreline.

Classic styleA method of shooting with equally not enough deviation equally doable from habitual relaxed body position.ClickerSmall strip of metal mounted on the find window inside front of the arrow surplus giving precise indication of satiated magnet by snapping rancid the arrow top with an audible "click".CloutA idea of target shooting inside which an arrow is shot into the air by a 15 metre diameter target on the ground by distances of up to 180 metres.Cock featherThe spine otherwise vane fit by aptly angles to the slot inside the nock (also called the pointer fletch).

Composite bowA Bow made of other than lone material.Not necessarily a laminated bow.Compound bowA hand-drawn, hand-held bow with the intention of pro akin poundage by satiated draw, supplies other energy than a recurve bow through the aid of two cables and two eccentric wheels.Generally present compound bows be inflicted with a 65 let-off of the summit magnet poundage by satiated draw, e.

a compound bow of 60lb.summit consequence want be inflicted with a holding consequence of approx.21lb.by satiated draw.

CreepLetting the arrow move unhurriedly forwards previous to relief (not maintaining magnet length).Ordinarily caused by loss of shoulder/back muscle tension.CrestingColoured bands useful to the arrow bar used equally identifying marks.These are solely approximately of the stipulations with the intention of you could run into inside the planet of Archery.

Think it over pro physically why Archery is the sport with the intention of it is, You want befall glad with the intention of you did.

mates sub keeps cutting in and out.?

Ma mate has got a kenwood headunit connected to a bose (i tink dats it) amp powering a single kenwwod 12" sub. the sub keeps cutting in and out, so like hel b playin music n itl jst randomly stop or start up. I have a general idea what im doing, bt im no expert. Im goin to hav a good look at it 2morro bt id appreciate some feedback as to what 2 look 4.
The amp dsnt cut off, the light stays green jst the sub stops producing any sound.
I am going to check the grounding wire, the battery wire and behind the headunit for loose wires but apart from that im not sure what to look for cus i doubt they r the culprits due to the amps continous working. The amp also has cooling fan so it cant b overheating or anything.
The sub works fine when connected to my system
also the amp is mounted on enclousure so is it possible this has screwed the amp into not always passing along the signal to the amp?
any help as to what to look for would b appreciated thank you

sounds like the gain (input sensitivity setting) is too high, its to maximize clean signal strength from your amp

Set the input sensitivity controls of your amplifier to their minimum level (counter clockwise).
Put in a CD and turn the receiver's volume control up (you might have to raise the amp's gain just a bit to hear the music).
When you hear distortion, stop. Turn the volume down until it disappears. As much signal as possible is passing from the receiver to the amp. This maximizes the signal-to-noise ratio, and leaves your system less prone to engine noise problems. Keep the volume setting here.
Now turn the gain controls on the amplifier up until it's as loud as you'll play it. If you hear distortion, slightly decrease the gain settings.
Now you've optimized the amp's output with the receiver's volume set near maximum. You can turn the volume almost all the way up and not damage your speakers or amplify distortion. If you're hooking up a subwoofer, a test disc (or bass-heavy CD) is helpful for making final adjustments.

Used- Merritt Davis ¾" Single Screw Co-Extruder - Stock# 43276003